The pilot of a community kitchen in Portee-Rokupa, Freetown, Sierra Leone
There is political controversary around the total population of Freetown, Sierra Leone. The 2021 mid-term Population and Housing census noted a significant decrease in Freetown’s population which has subsequently been challenged by the mayor and other leading stakeholders. Statistics vary from 600,000 to 1.35million. Regardless, it is estimated that 36% of the city’s population live within densely populated informal settlements scattered across Freetown’s eastern peninsula. These communities, not too dissimilar to other low-income settlements across the city, and indeed other densely populated urban centres, are often located in geographically vulnerable areas and prone to increased hazards, risks and disasters.
It is in the informal settlement of Portee Rokupa where researchers from the University of Bristol have been working since 2021 (Figure 1). The ESRC funded ‘Beyond the Networked City’ project (grant number: ES/T007656/1) is a collaboration between the University of Bristol, Loughborough University, Sierra Leone Urban Research Centre (SLURC), Makerere University, and the University of Cape Town that seeks to further understand urban service delivery of key infrastructure such as water, sanitation and energy in Freetown and Kampala. In close partnership with SLURC, over 360 households in Portee Rokupa were surveyed on their energy services such as electricity and cooking.
Figure 1: Map of Portee Rokupa, Freetown
In Portee Rokupa, like most of these communities, their residents, mainly women and young girls, carry out the daily task of cooking. Cooking, whether for personal consumption or income generating purposes, is usually prepared using traditional biomass fuels such as charcoal with basic, inefficient metal stoves called coal pots (Figure 2). The use of traditional coal pot stoves are contributors to air pollution and environmental degradation affecting health of users and local forest cover.
Figure 2: A stereotypical charcoal coal pot used in Freetown
Working closely with the residents and community actors in Portee Rokupa, there is an overwhelming desire to transition to cleaner cooking solutions, but there are challenges around accessibility, availability, finance, and imposed knowledge that hinders the sustainable uptake of ‘clean’ cookstoves. Whilst trying to further understand what could be done to improve their cooking service delivery, the idea for a communal cooking space, which offers a range of cooking technologies, to be used on a pay-as-you basis, was both desirable and aspirational for the community.
SLURC project managed the community kitchen project whilst also facilitating community dialogue to ensure that residents themselves were part of the design and construction, and management of the kitchen. They also fostered new and existing partnerships with key stakeholders including the Government Technical Institute (GTI), the Electricity Generation and Transmission Company (EGTC), and Afrigas, a national LPG supplier. What started as ad-hoc discussions around the need to improve cooking service delivery within informal settlements, turned into the creation of the Platform for Energy Safety, innovation, and Access Consortium (PESIA), a call to action for stakeholders to further understand the cooking needs of residents living in informal settlements.
To ensure long-term sustainability of the kitchen, community members were selected to become community Energy Champions and were trained by the above stakeholders on the use, maintenance, finance and safety of different cooking technologies that would enable them to provide tailored support in the community kitchen as well as broader advice around energy choices within the community. The community were involved at every stage of the project from kitchen design, choice of location, selection of preferred stoves and fuels as well as overall kitchen management. For example, because Portee Rokupa is predominantly a fishing community, the desire for larger stoves and ovens that would help smoke, preserve and process fish was something residents regularly communicated. The community kitchen does not only provide access to improved cooking facilities, but also serves as a hub for broader community interaction, something that is of importance to the community.
Figure 3: Training of Energy Champions
So, what has the Community Kitchen achieved? Since it’s official launch in May 2024 (Figure 4), the pilot has received significant attention within Freetown, especially on social media channels and within local news outlets. Management of the kitchen has been fully handed over to the community and energy champions who have elected a chairwoman and a chairman who will oversee the use of the kitchen and be responsible for financial accountability. Residents of Portee Rokupa are now regularly using the kitchen facilities, not only for their mealtime cooking, but for community events such as parties and weddings, and local entrepreneurs are using the kitchen for productive uses such as food preparation, fish smoking and soap making.
The broader impact of this initiative extends beyond the immediate benefits of access to cleaner, more efficient cooking solutions. The kitchen is now an official vendor of Afrigas bottles, bringing a consistent supply of LPG to the community for the first time. Community buy-in, consistent dialogue, co-creation of kitchen design and the training of energy champions has fostered a sense of ownership and responsibility, encouraging them to advocate for and implement sustainable practices within their communities. This grassroots approach has also extended into other informal communities such as Susan’s Bay and Dwazark where energy champions are spreading their knowledge to ensure households are more aware of different cooking options available rather than solely relying on traditional ways of cooking. The Portee-Rokupa community kitchen was a pilot initiative driven by a community desire to have access to alternative cooking services. It is now forging its way as a beacon of knowledge, empowerment and sustainability. It demonstrates how targeted training and community engagement can drive significant changes, paving the way for a more sustainable and resilient future for all. As these Energy Champions continue their work, they are not just transforming kitchens; they are transforming lives and building a brighter, greener future for their communities.
Figure 4: Cooking in the community kitchen on launch day, May 2024
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This blog is written by Amadu Kamara Labor and Dora Vangahun from Sierra Leone Urban Research Centre, Freetown, Sierra Leone; and Charlotte Ray and Sam Williamson from the School of Electrical, Electronic and Mechanical Engineering, Electrical Energy Management Research Group, University of Bristol.
The background research behind this work was funded by the ESRC through grant ES/T007656/1, Beyond the Networked City: Building innovative delivery systems for water, sanitation and energy in urban Africa. The Community Kitchen was funded by a joint EPSRC/ESRC Impact Acceleration Account Award, grant numbers EP/X525674/1 ES/X004392/1.
From a social scientist’s point of view, the recent IPCC report and the reception it has received are a bit odd. The report certainly reflects a huge amount of work, its message is vital, and it’s great so many people are hearing it. But not much in the report updates how we think about climate change. We’ve known for a while that people are changing the climate, and that how much more the climate changes will depend on the decisions we make.
What decisions? The Summary for Policymakers— the scientists’ memo to the people who will make the really important choices—doesn’t say. The words “fossil fuel”, “oil”, and “coal” never even appear. Nor “regulation”, “ban”, “subsidy”, or “tax”. The last five pages of the 42-page Summary are entitled “Limiting Future Climate Change”; but while “policymakers” appear, “policies” do not.
This is not the fault of the authors; Working Group I’s remit does not include policy recommendations. Even Working Group III (focused on mitigation) is not allowed to advocate for specific choices. Yet every IPCC contributor knows the most important question is which emission pathway we take, and that will depend on what policies we choose.
Which is why it’s so odd that big policy issues and announcements get comparatively little airtime (and research funding). For example, in June, the European Union codified in law the goal of reducing its greenhouse gas emissions 55% by 2030 (relative to 1990), and last month the European Commission presented a set of ambitious proposals for hitting that target. As a continent, Europe is already leading the world in emission reductions (albeit starting from a high level, with large cumulative historical emissions), and showing the rest of the world how to organize high-income societies in low-carbon ways. But the Commission’s proposals—called “Fit for 55”—have gone largely under the radar, not only outside of the EU but even within it.
The proposals are worth examining. At least according to the Commission, they will make the EU’s greenhouse gas emissions consistent with its commitments under the Paris Agreement. (Independent assessments generally agree that while a 55% reduction by 2030 won’t hit the Paris Agreement’s 1.5˚ target, it would be a proportionate contribution to the goal of limiting global heating to no more than 2˚.) And they will build on the EU’s prior reduction of its territorial emissions by 24% between 1990 and 2019.
A change of -24% over that period, and -18% for consumption emissions, is in one sense disappointing, given that climate scientists were warning about the need for action even before 1990. But this achievement, inadequate though it may be, far exceeds those of other high per-capita emitters, like the U.S. (+14%), Canada (+21%), or Australia (+54%).
The most notable reductions have been in the areas of electricity generation and heavy industry—sectors covered by the EU’s emissions trading system (ETS). Emissions from buildings have not declined as much, and those from transportation (land, air, and marine) have risen. Several of the Fit for 55 proposals therefore focus on these sectors. Maritime transport is to be incorporated into the ETS; free permits for aviation are to be eliminated; and a new, separate ETS for fuels used in buildings and land transport is to be established. Sales of new cars and trucks with internal combustion engines will end as of 2035, and increased taxes will apply to fuels for transport, heat, and electricity.
The Commission also proposes to cut emissions under the ETS by 4.2% each year (rather than 2.2% currently); expand the share of electricity sourced from renewables; and set a stricter (lower) target for the total amount of energy the EU will use by 2030—for the sake of greater energy efficiency.
All of this is going to be hugely contentious, and it will take a year or two at least for the Commission, the member-states, and the European Parliament to negotiate a final version. Corporate lobbying will shape the outcome, as will public opinion (paywall).
Two of the most interesting proposals are meant to head off opposition from industry and voters. A carbon border adjustment mechanism will put a price on greenhouse gases emitted by the production abroad of selected imports into the EU (provisionally cement, fertiliser, iron, steel, electricity, and aluminium). This will protect European producers from competitors subject to weaker rules. A social climate fund, paid for out of the new ETS, will compensate low-income consumers and small businesses for the increased costs of fossil fuels—thereby preventing any rise in fuel poverty.
No country is doing enough to mitigate emissions. But Fit for 55 represents the broadest, most detailed emissions reductions plan in the world—and, in some form, it will be implemented. Decision-makers everywhere should be studying, and making, policies like this.
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This guest blog is by friend of Cabot Insitute for the Environment and PLOS Climate Academic Editor Malcolm Fairbrother. Malcolm is a Professor of Sociology at Umeå University (Sweden), the Institute for Futures Studies (Stockholm), and University of Graz (Austria). Twitter: @malcolmfair. This blog has been reposted with kind permission from Malcolm Fairbrother. View the original blog.
Is hydrogen the lifeblood of a low-carbon future, or an overhyped distraction from real solutions? One thing is certain – the coal, oil and natural gas which currently power much of daily life must be phased out within coming decades. From the cars we drive to the energy that heats our homes, these fossil fuels are deeply embedded in society and the global economy. But is the best solution in all cases to swap them with hydrogen – a fuel which only produces water vapour, and not CO₂, when burned?
Answering that question are six experts in engineering, physics and chemistry.
Road and rail
Hu Li, Associate Professor of Energy Engineering, University of Leeds
Transport became the UK’s largest source of greenhouse gas emissions in 2016, contributing about 28% of the country’s total.
Replacing the internal combustion engines of passenger cars and light-duty vehicles with batteries could accelerate the process of decarbonising road transport, but electrification isn’t such a good option for heavy-duty vehicles such as lorries and buses. Compared to gasoline and diesel fuels, the energy density (measured in megajoules per kilogram) of a battery is just 1%. For a 40-tonne truck, just over four tonnes of lithium-ion battery cells are needed for a range of 800 kilometres, compared to just 220 kilograms of diesel.
With the UK government set to ban fossil fuel vehicles from 2035, hydrogen fuel cells could do much of the heavy lifting in decarbonising freight and public transport, where 80% of hydrogen demand in transport is likely to come from.
A fuel cell generates electricity through a chemical reaction between the stored hydrogen and oxygen, producing water and hot air as a byproduct. Vehicles powered by hydrogen fuel cells have a similar driving range and can be refuelled about as quickly as internal combustion engine vehicles, another reason they’re useful for long-haul and heavy-duty transport.
Hydrogen fuel can be transported as liquid or compressed gas by existing natural gas pipelines, which will save millions on infrastructure and speed up its deployment. Even existing internal combustion engines can use hydrogen, but there are problems with fuel injection, reduced power output, onboard storage and emissions of nitrogen oxides (NOₓ), which can react in the lower atmosphere to form ozone – a greenhouse gas. The goal should be to eventually replace internal combustion engines with hydrogen fuel cells in vehicles that are too large for lithium-ion batteries. But in the meantime, blending with other fuels or using a diesel-hydrogen hybrid could help lower emissions.
It’s very important to consider where the hydrogen comes from though. Hydrogen can be produced by splitting water with electricity in a process called electrolysis. If the electricity was generated by renewable sources such as solar and wind, the resulting fuel is called green hydrogen. It can be used in the form of compressed gas or liquid and converted to methane, methanol, ammonia and other synthetic liquid fuels.
But nearly all of the 27 terawatt-hours (TWh) of hydrogen currently used in the UK is produced by reforming fossil fuels, which generates nine tonnes of CO₂ for every tonne of hydrogen. This is currently the cheapest option, though some experts predict that green hydrogen will be cost-competitive by 2030. In the meantime, governments will need to ramp up the production of vehicles with hydrogen fuel cells and storage tanks and build lots of refuelling points.
Hydrogen can play a key role in decarbonising rail travel too, alongside other low-carbon fuels, such as biofuels. In the UK, 6,049 kilometres of mainline routes run on electricity – that’s 38% of the total. Trains powered by hydrogen fuel cells offer a zero-emission alternative to diesel trains.
The Coradia iLint, which entered commercial service in Germany in 2018, is the world’s first hydrogen-powered train. The UK recently launched mainline testing of its own hydrogen-powered train, though the UK trial aims to retrofit existing diesel trains rather than design and build entirely new ones.
Aviation
Valeska Ting, Professor of Smart Nanomaterials, University of Bristol
Of all of the sectors that we need to decarbonise, air travel is perhaps the most challenging. While cars and boats can realistically switch to batteries or hybrid technologies, the sheer weight of even the lightest batteries makes long-haul electric air travel tricky.
Single-seat concept planes such as the Solar Impulse generate their energy from the sun, but they can’t generate enough based on the efficiency of current solar cells alone so must also use batteries. Other alternatives include synthetic fuels or biofuels, but these could just defer or reduce carbon emissions, rather than eliminate them altogether, as a carbon-free fuel like green hydrogen could.
Hydrogen is extremely light and contains three times more energy per kilogram than jet fuel, which is why it’s traditionally used to power rockets. Companies including Airbus are already developing commercial zero-emission aircraft that run on hydrogen. This involves a radical redesign of their fleet to accommodate liquid hydrogen fuel tanks.
An artist’s impression of what hydrogen-powered commercial flight might look like. Airbus
There are some technical challenges though. Hydrogen is a gas at room temperature, so very low temperatures and special equipment are needed to store it as a liquid. That means more weight, and subsequently, more fuel. However, research we’re doing at the Bristol Composites Institute is helping with the design of lightweight aircraft components made out of composite materials. We’re also looking at nanoporous materials that behave like molecular sponges, spontaneously absorbing and storing hydrogen at high densities for onboard hydrogen storage in future aircraft designs.
France and Germany are investing billions in hydrogen-powered passenger aircraft. But while the development of these new aircraft by industry continues apace, international airports will also need to rapidly invest in infrastructure to store and deliver liquid hydrogen to refuel them. There’s a risk that fleets of hydrogen aeroplanes could take off before there’s a sufficient fuel supply chain to sustain them.
Heating
Tom Baxter, Honorary Senior Lecturer in Chemical Engineering, University of Aberdeen & Ernst Worrell, Professor of Energy, Resources and Technological Change, Utrecht University
If the All Party Parliamentary Group on Hydrogen’s recommendations are taken up, the UK government is likely to support hydrogen as a replacement fuel for heating buildings in its next white paper. The other option for decarbonising Britain’s gas heating network is electricity. So which is likely to be a better choice – a hydrogen boiler in every home or an electric heat pump?
First there’s the price of fuel to consider. When hydrogen is generated through electrolysis, between 30-40% of the original electric energy is lost. One kilowatt-hour (kWh) of electricity in a heat pump may generate 3-5 kWh of heat, while the same kWh of electricity gets you only 0.6-0.7 kWh of heat with a hydrogen-fuelled boiler. This means that generating enough hydrogen fuel to heat a home will require electricity generated from four times as many turbines and solar panels than a heat pump. Because heat pumps need so much less energy overall to supply the same amount of heat, the need for large amounts of stored green energy on standby is much less. Even reducing these losses with more advanced technology, hydrogen will remain relatively expensive, both in terms of energy and money.
So using hydrogen to heat homes isn’t cheap for consumers. Granted, there is a higher upfront cost for installing an electric heat pump. That could be a serious drawback for cash-strapped households, though heat pumps heat a property using around a quarter of the energy of hydrogen. In time, lower fuel bills would more than cover the installation cost.
Replacing natural gas with hydrogen in the UK’s heating network isn’t likely to be simple either. Per volume, the energy density of hydrogen gas is about one-third that of natural gas, so converting to hydrogen will not only require new boilers, but also investment in grids to increase how much fuel they can deliver. The very small size of hydrogen molecules mean they’re much more prone to leaking than natural gas molecules. Ensuring that the existing gas distribution system is fit for hydrogen could prove quite costly.
In high-density housing in inner cities, district heating systems – which distribute waste heat from power plants and factories into homes – could be a better bet in a warming climate, as, like heat pumps, they can cool homes as well as heat them.
Above all, this stresses the importance of energy efficiency, what the International Energy Agency calls the first fuel in buildings. Retrofitting buildings with insulation to make them energy efficient and switching boilers for heat pumps is the most promising route for the vast majority of buildings. Hydrogen should be reserved for applications where there are few or no alternatives. Space heating of homes and buildings, except for limited applications like in particularly old homes, is not one of them.
Electricity and energy storage
Petra de Jongh, Professor of Catalysts and Energy Storage Materials, Utrecht University
Fossil fuels have some features that seem impossible to beat. They’re packed full of energy, they’re easy to burn and they’re compatible with most engines and generators. Producing electricity using gas, oil, or coal is cheap, and offers complete certainty about, and control over, the amount of electricity you get at any point in time.
Meanwhile, how much wind or solar electricity we can generate isn’t something that we enjoy a lot of control over. It’s difficult to even adequately predict when the sun will shine or the wind will blow, so renewable power output fluctuates. Electricity grids can only tolerate a limited amount of fluctuation, so being able to store excess electricity for later is key to switching from fossil fuels.
Hydrogen seems ideally suited to meet this challenge. Compared to batteries, the storage capacity of hydrogen is unlimited – the electrolyser which produces it from water never fills up. Hydrogen can be converted back into electricity using a fuel cell too, though quite a bit of energy is lost in the process.
Unfortunately, hydrogen is the lightest gas and so it’s difficult to store and transport it. It can be liquefied or stored at very high pressures. But then there’s the cost – green hydrogen is still two to three times more expensive than that produced from natural gas, and the costs are even higher if an electrolyser is only used intermittently. Ideally, we could let hydrogen react with CO₂, either captured from the air or taken from flue gases, to produce renewable liquid fuels that are carbon-neutral, an option that we’re investigating at the Debye Institute at Utrecht University.
Heavy industry
Stephen Carr, Lecturer in Energy Physics, University of South Wales
Industry is the second most polluting sector in the UK after transport, accounting for 21% of the UK’s total carbon emissions. A large proportion of these emissions come from processes involving heat, whether it’s firing a kiln to very high temperatures to produce cement or generating steam to use in an oven making food. Most of this heat is currently generated using natural gas, which will need to be swapped out with a zero-carbon fuel, or electricity.
Let’s look in depth at one industry: ceramics manufacturing. Here, high-temperature direct heating is required, where the flame or hot gases touch the material being heated. Natural gas-fired burners are currently used for this. Biomass can generate zero-carbon heat, but biomass supplies are limited and aren’t best suited to use in direct heating. Using an electric kiln would be efficient, but it would entail an overhaul of existing equipment. Generating electricity has a comparably high cost too.
Swapping natural gas with hydrogen in burners could be cheaper overall, and would require only slight changes to equipment. The Committee on Climate Change, which advises the UK government, reports that 90 TWh of industrial fossil fuel energy per year (equivalent to the total annual consumption of Wales) could be replaced with hydrogen by 2040. Hydrogen will be the cheapest option in most cases, while for 15 TWh of industrial fossil fuel energy, hydrogen is the only suitable alternative.
Hydrogen is already used in industrial processes such as oil refining, where it’s used to react with and remove unwanted sulphur compounds. Since most hydrogen currently used in the UK is derived from fossil fuels, it will be necessary to ramp up renewable energy capacity to deliver truly green hydrogen before it can replace the high-carbon fuels powering industrial processes.
The same rule applies to each of these sectors – hydrogen is only as green as the process that produced it. Green hydrogen will be part of the solution in combination with other technologies and measures, including lithium-ion batteries, and energy efficiency. But the low-carbon fuel will be most useful in decarbonising the niches that are currently difficult for electrification to reach, such as heavy-duty vehicles and industrial furnaces.
Energise Sussex Coast and South East London Community Energy are set to benefit from a new business collaboration led by Colin Nolden and supported by PhD students Peter Thomas and Daniela Rossade. This is funded by the Economic and Social Research Council with match funding provided by Community Energy South from SGN. In total, £80,000 has been made available from the Economic and Social Research Council Impact Accelerator Account to launch six new Accelerating Business Collaborations involving the Universities of Bath, Exeter and Bristol. This funding aims to increase capacity and capability of early career researchers and PhD students to collaborate with the private sector. Match funding from SGN (formerly Scotia Gas Network) provided by Community Energy South for this particular project will free up time and allow Energise Sussex Coast and South East London Community Energy to provide the necessary company data and co-develop appropriate data analysis and management methodologies.
The Capturing the value of community energy project evolved out of the Bristol Poverty Institute (BPI) interdisciplinary webinar on Energy and Fuel Poverty and Sustainable Solutions on 14 May 2020. At this event Colin highlighted the difficulty of establishing self-sustaining fuel-poverty alleviation business models, despite huge savings on energy bills and invaluable support for some of the most marginalised segments of society. Peter also presented his PhD project, which investigates the energy needs and priorities of refugee communities. With the help of Ruth Welters from Research and Enterprise Development and Lauren Winch from BPI, Colin built up his team and concretised his project for this successful grant application.
The two business collaborators Energise Sussex Coast (ESC) and South East London Community Energy (SELCE) are non-profit social enterprises that seek to act co-operatively to tackle the climate crisis and energy injustice through community owned renewable energy and energy savings schemes. Both have won multiple awards for their approach to energy generation, energy saving and fuel poverty alleviation.
However, both are also highly dependent on grants from energy companies such as SGN with complicated and highly variable reporting procedures. This business collaboration will involve the analysis of their company data (eight years for ESC, ten years for SELCE) to take stock of what fuel poverty advice and energy saving action works and what does not, and to grasp any multiplier effects associated with engaging in renewable energy trading activities alongside more charitable fuel poverty alleviation work.
Benefits for ESC and SELCE include the co-production of a database to help them establish what has and has not worked in the past, and where to target their efforts moving forward. This is particularly relevant in the context of future fuel-poverty alleviation funding bids. With a better understanding of what works, they will be able to write better bids and target their advice more effectively, thus improving the efficiency of the sector more broadly.
It will also help identify new value streams, such as those resulting from lower energy bills. Rather than creating dependents, this provides the foundation for business model innovation through consortium building and economies of scale where possible, while improving targeted face-to-face advice where necessary. It will also explore socially distant approaches where face-to-face advice and engagement is no longer possible.
With a better understanding how and where value is created, ESC and SLECE, together with other non-profit enterprises, can establish a platform cooperative while creating self-renewing databases which enable more targeted energy saving and fuel poverty advice in future. Such data also facilitates application for larger pots of money such as Horizon2020, and the establishment of a fuel poverty ecosystem in partnership with local authorities and other organisations capable of empowering people instead of creating dependents. This additional reporting will capture a wider range of value and codify it to be submitted as written evidence to the Cabinet Office and Treasury at national level, while also acting as a dynamic database for inclusive economy institutions and community energy organisations at regional and local level.
People
Dr Colin Nolden is a Vice-Chancellor’s Fellow based on the Law School, University of Bristol, researching sustainable energy governance at the intersection of demand, mobility, communities, and climate change. Alongside his appointment at the University of Bristol, Colin works as a Researcher at the Environmental Change Institute, University of Oxford. He is also a non-executive director of Community Energy South and a member of the Cabot Institute for the Environment.
Peter Thomas is a University of Bristol Engineering PhD student and member of the Cabot Institute for the Environment investigating access to energy in humanitarian relief by combining insights from engineering, social sciences, and anthropology.
Daniela Rossade is a University of Bristol Engineering PhD student investigating the transition to renewable energy on the remote island of Saint Helena and the influence of renewable microgrids on electricity access and energy poverty.
Approximately 3 billion people around the world rely on biomass fuels such as wood, charcoal and animal dung which they burn on open fires and using inefficient stoves to meet their daily cooking needs.
Relying on these types of fuels and cooking technologies is a major contributor to indoor air pollution and has serious negative health impacts, including acute respiratory illnesses, pneumonia, strokes, cataracts, heart disease and cancer.
The World Health Organization estimates that indoor air pollution causes nearly 4 million premature deaths annually worldwide – more than the deaths caused by malaria and tuberculosis combined. This led the World Health Organization to label household air pollution “The Killer in the Kitchen”.
As illustrated on the map below, most deaths from indoor air pollution occur in low- and middle-income countries across Africa and Asia. Women and children are disproportionately exposed to the risks of indoor air pollution as they typically spend the most time cooking.
Number of deaths attributable to indoor air pollution in 2017. Image credit Our World in Data.
Replacing open fires and inefficient stoves with modern, cleaner solutions is essential to reduce indoor air pollution and personal exposure to emissions. However, research suggests that only significant reductions in exposure can tangibly reduce negative health impacts.
The Clean Cooking Alliance, established in 2010, has focused mainly on the dissemination of improved cookstoves (ICS) – wood-burning or charcoal stoves designed to be much more efficient than more traditional models – with some success.
Randomised control trials of sole use of ICS have shown reductions in pneumonia and the duration of respiratory infections in children. However, other studies, including some funded by the Alliance, have shown that ICS have not performed well enough in the field to sufficiently reduce indoor air pollution to lessen health risks such as pneumonia and heart disease.
Alternative fuels such as liquid petroleum gas (LPG), biogas and ethanol present other options for cooking with LPG already prevalent in many countries across the world.
LPG is clean-burning and produces much less carbon dioxide than burning biomass but is still a fossil fuel.
Biogas is a clean, renewable fuel made from organic waste, and ethanol is a clean biofuel made from a variety of feedstocks.
Electric cooking, once seen as a pipe dream for developing countries, is becoming more feasible and affordable due to improvements and reductions in costs of technologies like solar panels and batteries.
Improved cookstoves, alternative fuels and electric cooking have been gaining traction but there is still a long way to go to solving the deadly problem of indoor air pollution.
Bristol, along with 20 other cities, in 6 different countries, was host to an interesting approach to science communication – over three nights, 19 – 21 May 2014, science took place at the pub!
Although varied, relevant and interesting research takes place every day at Universities, in many cases the general public is completely unaware of what goes on inside them – other than lectures and exams! Pint of Science is a volunteer-based, not-for-profit festival, which takes academic research into the everyday world, by having scientists at the pub sharing their work and answering questions.
Premièring this year in Bristol, the festival was well received, with many of the events sold-out before the doors were even opened. Across the city, four pubs opened their doors to a curious audience looking to learn about a range of topics from nanotechnology, to energy, to the brain and oceans or volcanoes.
Engaging society being at the heart of the Cabot Institute’s aims, it was quick to become involved when approached. As well as sponsoring the event, the Institute was well represented by two of its members, Professors David Fermín and Paul Weaver, who shared their research during the festival.
Energy, Materials and the Electrochemist Dream
L-R David Parker and David Fermin
Prof David Fermín and one of his PhD students, Mr David Parker, took on the second evening of the festival, talking about “Energy, Materials and the Electrochemist Dream”. During this event renewable energy sources, in particular solar, were championed. Of interest was the many ways in which solar energy can be harvested and used, whether to be directly converted into electricity or used to produce “solar fuels” from water or carbon dioxide. The need for developing new photovoltaic materials, which are cheap, efficient and made from abundant elements, was stressed. Questions from the public revolved about “how green” these technologies really are and the need to develop a “complete, systematic” approach to energy, which can incorporate various forms and sources of energy. This last is another key interest of the Institute, with groups in Bristol doing interesting work in this area.
Morphing cars, planes and wind turbines: the shape of things to come
Paul Weaver talks to the pub-goers
On the festival’s last evening, Prof Paul Weaver and one of his PhD students, Eric Eckstein, talked about “Morphing cars, planes and wind turbines: the shape of things to come”. They discussed the development of new composite materials with the ability to tailor structural properties and the difficulties involved in predicting responses. Also highlighted was the very important interaction and synergy between University and Industry in this field. In a particularly interactive approach they brought along many of the composite materials they work with, alongside demonstrating the strength and failure of various materials, allowing the public to see and feel how different properties can be altered. The use of composite materials in wind turbines and helicopter blades was of particular interest and generated an animated discussion on the subject.
Energy security- a primarily theoretical concept in recent years that has been made startlingly real by the recent developments in Ukraine. But what could the possible repercussions of this crisis be on European energy policies and our fuel bills?
I had a chance to ask this question during a recent event at the House of Commons, hosted by the APPCCG and Sandbag. The answer surprised me.
According to Baroness Worthington, director of Sandbag and member of the House of Lords, two outcomes are broadly possible.
Figure 1: Map of Ukraine
The first scenario is of a stabilisation of the diplomatic situation and the emergence of a westward-leaning Ukraine. In this situation, it is likely that Ukraine might choose to exploit its own natural gas reserves, estimated to be in the region of 1.1 trillion cubic metres. Ukraine possesses the 26th largest natural gas reserve in the world, which is estimated to be more than half the size of the combined reserves of the EU.
If Ukraine `turns on the taps’, this would solve their immediate energy dependence on Russia and produce a revenue stream to support their economy. However, exploiting natural resources on the scale required would require significant investment, and Ukrainians would have to accept the change in land use and economic transformations that come with becoming a major energy exporter.
This optimistic outcome seems open to several criticisms. It’s unclear at this moment where investment would come from, and whether Russia would oppose competition in the European energy market. Moreover, can Ukraine ever completely replace Russia as an energy supplier? For instance, Russia’s natural gas reserves are around 40 times the size of Ukraine’s.
The second scenario is of a destabilised Ukraine, whose policies are influenced to a significant degree by Moscow. In this situation, European nations would need to purchase natural gas in the short-to-medium term from Russia and Ukraine, and tamely accept price rises and the uncertainty and energy insecurity that comes with dependence on a foreign nation for energy supplies.
This second possibility may also be criticised; Russia may not have further demands after the annexation of Crimea is completed. It may be the case that Russia wish to return to business as usual as quickly as possible, and may choose to offer energy supplies on favourable terms to Europe in order to encourage the resumption of trade and renewed trust.
In my view, both scenarios will result in one predominant outcome: the loss of trust. It seems unlikely that Russia can regain the trust of the West quickly; by it’s very nature, trust takes years to accrue and moments to lose. Energy security will become a much larger talking point in the next few years if relations with Russia continue to remain cool. Nations that previously were willing to base their energy supply on foreign gas purchases will choose instead to pay a price or environmental premium to source those supplies from more trusted sources.
The nations most likely to make changes to their energy mix as a result of this crisis are Germany and Poland. Germany’s choice to abandon nuclear fission after the Fukushima crisis leaves them slightly more vulnerable to a loss of fuel supplies from abroad, and they may choose to shift further towards renewables, or attempt the politically difficult U-turn of returning to nuclear power. Poland uses natural gas and coal to power much of its economy, a significant portion of which is purchased from Russia. Since the fall of the Soviet Union, Poland has been consistently suspicious of Russia, and may decide that now is the time to reduce or remove their dependence on Russian supplies.
Figure 2: DECC figure for natural gas supplies by source, 2010-2013
As for the fuel bills of UK consumers, it’s unlikely that we will see any immediate effects. If sanctions on Russia are imposed, this may raise gas prices worldwide, but the UK does not directly obtain its supplies from Russia. The most likely change to the UK’s energy mix will be one that was on the cards already- an expansion in the exploitation of shale gas. Using energy security as a primary argument, supporters of shale gas may now find it easier to convince others that fracking and onshore gas exploitation should continue or be accelerated.
Perhaps the Ukraine crisis will be the public relations coup the shale gas industry has been looking for.
