Energy Policy, 30 March 2010, DOI: 10.1016/j.enpol.2010.02.050

The forbidden fuel: Charcoal, urban woodfuel demand and supply dynamics, community forest management and woodfuel policy in Malawi.

Leo Charles Zulu,

This article examines woodfuel policy challenges and opportunities in Malawi two decades after woodfuel-crisis narratives and counter-narratives. A nuanced examination of woodfuel supply, demand, use, and markets illuminated options to turn stagnant policies based on charcoal `bans’ and fuel-substitution into proactive, realistic ones acknowledging woodfuel dominance and its socio-economic importance.

Findings revealed growing, spatially differentiated woodfuel deficits in southern and central Malawi and around Blantyre, Zomba and Lilongwe cities.  Poverty, limited electricity access, reliability and generation exacerbated by tariff subsidies, and complex fuel-allocation decisions restricted energy-ladder transitions from woodfuels to electricity, producing an enduring urban-energy mix dominated by charcoal, thereby increasing wood consumption.

Diverse socio-political interests prevented lifting of the charcoal `ban’ despite progressive forest laws. Despite implementation challenges, lessons already learnt, efficiency and poverty-reduction arguments, limited government capacity, growing illegal production of charcoal in forest reserves, and its staying power, make targeted community-based forest management (CBFM) approaches more practical for regulated, commercial production of woodfuels than the status quo.

New differentiated policies should include commercial woodfuel production and licensing for revenue and ecological sustainability under CBFM or concessions within and outside selected reserves, an enterprise-based approaches for poverty reduction, smallholder/private tree-growing, woodfuel-energy conserving technologies, improved electricity supply and agricultural productivity.

Environ Health Perspect. 2010 Apr;118(4):558-64.

Tuberculosis and indoor biomass and kerosene use in Nepal: a case-control study.

Pokhrel AK, Bates MN, Verma SC, Joshi HS, Sreeramareddy CT, Smith KR.

School of Public Health, University of California-Berkeley, Berkeley, California, USA.

Background: In Nepal, tuberculosis (TB) is a major problem. Worldwide, six previous epidemiologic studies have investigated whether indoor cooking with biomass fuel such as wood or agricultural wastes is associated with TB with inconsistent results.Objectives: Using detailed information on potential confounders, we investigated the associations between TB and the use of biomass and kerosene fuels.

Methods: A hospital-based case-control study was conducted in Pokhara, Nepal. Cases (n = 125) were women, 20-65 years old, with a confirmed diagnosis of TB. Age-matched controls (n = 250) were female patients without TB. Detailed exposure histories were collected with a standardized questionnaire.

Results: Compared with using a clean-burning fuel stove (liquefied petroleum gas, biogas), the adjusted odds ratio (OR) for using a biomass-fuel stove was 1.21 [95% confidence interval (CI), 0.48-3.05], whereas use of a kerosene-fuel stove had an OR of 3.36 (95% CI, 1.01-11.22). The OR for use of biomass fuel for heating was 3.45 (95% CI, 1.44-8.27) and for use of kerosene lamps for lighting was 9.43 (95% CI, 1.45-61.32).

Conclusions: This study provides evidence that the use of indoor biomass fuel, particularly as a source of heating, is associated with TB in women. It also provides the first evidence that using kerosene stoves and wick lamps is associated with TB. These associations require confirmation in other studies. If using kerosene lamps is a risk factor for TB, it would provide strong justification for promoting clean lighting sources, such as solar lamps. Editor’s

Summary – Tuberculosis (TB) is a major infectious cause of illness and death worldwide, and the majority of new cases and deaths occur in Asia and Africa. Results of previous epidemiologic studies of indoor cooking with biomass fuels (e.g., wood or agricultural waste) and TB have been inconsistent. Pokhrel et al (p. 558) investigated TB and the use of biomass and kerosene fuels in a case-control study in Nepal. Cases were women, 20-65 years of age, with a confirmed diagnosis of TB; age-matched controls were female patients without TB. The investigators found that TB was associated with the use of a biomass-fuel stove compared with a stove burning clean fuels (e.g., liquefied petroleum gas, biogas), and there were also associations with the use of a kerosene-fuel stove and with the use of biomass fuel for heating and kerosene lamps for lighting. The authors conclude that the use of indoor biomass fuel, particularly as a source of heating, is associated with TB in women. The authors also note that if the use of kerosene lamps can be confirmed as a risk factor for TB, there would be justification for promoting alternative lighting sources such as solar lamps.

Auckland University child health researchers are calling for action by health professionals over the risks they say climate change poses to the wellbeing of children.

They will shortly publish in the Journal of Paediatrics and Child Health a report on the climate change implications for child health in Australasia.

Climate change was the greatest health threat of the century, but responses could be tailored to help produce healthier people in a more equal society and more sustainable economy, the researchers said.

“Much can and should be done to avoid the worst effects,” they said.

One researcher, public health specialist Dr Jamie Hosking, said that children were “especially vulnerable” to climate change.

There was likely to be an increase in extreme weather events, such as more intense storms, floods, and droughts, and children who were smaller and less strong than adults would face higher risks from extremes of heat and flooding.

Maori and Pacific children living in poorer conditions were especially at risk, but all children faced threats to basic survival needs, such as the availability of safe and sufficient water, healthy and sufficient food, and adequate shelter in storms, floods and droughts.

Constraints on energy supplies were likely to raise energy prices, leading to more families living in “fuel poverty”, he said.

“Interruptions to food supplies are likely to raise food prices, increasing food insecurity in some families.”

Children were more likely than adults to live in low-income households, so were more vulnerable to fuel poverty and food insecurity.

But there could be a silver lining if strong policies to reduce greenhouse gas emissions spread costs and benefits equitably across society.

Government programmes to insulate older houses could be improved to ensure the homes of the poorest children were both energy efficient and healthy – reducing childhood asthma and chest infections which were leading causes of hospital admissions, particularly for Maori and Pacific children.

Social inequalities in health outcomes, such as those suffered by Maori and Pacific children, could also be reduced by the right climate policies.

A low-carbon transport system that made it easy and safe to walk, cycle and use public transport, could improve child health through reduced air pollution, asthma, and child lung problems, with more physical activity helping to reduce obesity rates.

The health benefits of these strategies could help New Zealanders directly, and were relatively immediate.

Different risks were faced by high-income countries such as Australia and New Zealand, compared with low-income Pacific island nations. In poorer nations, clean-burning cooking stoves might be of more relevance than improved insulation.

The paper did not detail the risks of a warmer climate enabling the establishment of exotic mosquitoes enabling the spread of diseases such as dengue fever, Japanese encephalitis or Ross River virus, but said important communicable diseases may become more common.

Hosking said some children in southern regions may benefit from warmer winters, through less exposure to cold, but overall the long-term effects of climate change were predicted to be negative.

Source – http://tvnz.co.nz/health-news/climate-action-could-boost-children-s-health-3455917

Acta Obstet Gynecol Scand. 2010 Apr; 89(4):540-8.

Exposure of pregnant women to indoor air pollution: a study from nine low and middle income countries.

Kadir MM, et al.

OBJECTIVE: We studied exposure to solid fuel and second-hand tobacco smoke among pregnant women in south Asia, Africa and Latin America.

DESIGN: Prospective cross-sectional survey.

SETTING: Antenatal clinics in Argentina, Brazil, Ecuador, Guatemala, Uruguay, Democratic Republic of Congo, Zambia, India and Pakistan.

SAMPLE: A total of 7,961 pregnant women in ten sites in nine countries were interviewed between October 2004 and September 2005.

METHODS: A standardized questionnaire on exposure to indoor air pollution (IAP) and second-hand smoke was administered to pregnant women during antenatal care.

MAIN OUTCOME MEASURES: Exposure to IAP and second-hand tobacco smoke.

RESULTS: South Asian pregnant women commonly reported use of wood (49.1-89.7%), crop residue and animal dung as cooking and heating fuel. African pregnant women reported higher use of charcoal (85.4-93.5%). Latin American pregnant women had greater use of petroleum gas. Among south Asian women, solid fuel use and cooking on an open flame inside the home were common. There was a significant association between solid fuel use and allowing smoking within the home at the Asian sites and in Zambia (p < 0.05).

CONCLUSIONS: Pregnant women from low/middle income countries were commonly exposed to IAP secondary to use of solid fuels. Among these populations, exposure to second-hand tobacco smoke was also common. This combination of exposures likely increases the risk of poor pregnancy outcomes among the most vulnerable women. Our study highlights the importance of further research on the combined impact of IAP and second-hand tobacco smoke exposures on adverse maternal and perinatal outcomes.

Below are links to the full-text of selected USAID sponsored reports on cookstoves and or indoor air pollution from the 1980’s to the present:

Date Feb 2010
Title Evaluation of manufactured wood-burning stoves in Dadaab refugee camps, Kenya
Affiliated Orgs. Berkeley Air Monitoring Group | U.S. Agency for International Development (USAID)
Author Pennise, David | Charron, Dana | et al.
http://pdf.usaid.gov/pdf_docs/PNADR829.pdf

——————————————————————————–

Date May 2009
Title Commercialization of improved cookstoves for reduced indoor air pollution in urban slums of northwest Bangladesh
Affiliated Orgs. Winrock International | U.S. Agency for International Development (USAID)
http://pdf.usaid.gov/pdf_docs/PNADO851.pdf

——————————————————————————–

Date Dec 2008
Title Fuel-efficient stove programs in IDP settings — summary evaluation report, Darfur, Sudan
Affiliated Orgs. Academy for Educational Development, Inc. (AED) | USAID. Bur. for Economic Growth, Agriculture and Trade. Ofc. of Infrastructure and Engineering
http://pdf.usaid.gov/pdf_docs/PDACM099.pdf

——————————————————————————–
Date Sep 2007
Title Fuel efficient stove programs in IDP settings — summary evaluation report, Uganda
Affiliated Orgs. Academy for Educational Development, Inc. (AED) | USAID. Bur. for Economic Growth, Agriculture and Trade. Ofc. of Infrastructure and Engineering
http://pdf.usaid.gov/pdf_docs/PDACM098.pdf

——————————————————————————–

Date 18 Jan 2007
Title International meeting on indoor air pollution, fuel efficient stoves and sustainable development : Brazil, Brasilia, October 16-17, 2006
Affiliated Orgs. Winrock International | USAID. Mission to Brazil | et al.
Author Ribeiro, Claudio | Miranda, Rogerio
http://pdf.usaid.gov/pdf_docs/PNADI781.pdf

——————————————————————————–

Date Dec 2002
Title Projet integre de developpement durable pour les zones de montagnes bassin versant Nakhla, Rif Occidental : introduction de fours ameliores = Introduction of improved cookstoves in the Nakhla[, Morocco] watershed
Affiliated Orgs. Chemonics International Inc. | USAID. Bur. for Economic Growth, Agriculture and Trade. Ofc. of Environment and Natural Resources
http://pdf.usaid.gov/pdf_docs/PNADB264.pdf

——————————————————————————–

Date 2008
Title Evaluating household energy and health interventions : a catalogue of methods
Affiliated Orgs. World Health Organization (WHO) | U.S. Environmental Protection Agency (EPA) | U.S. Agency for International Development (USAID)
http://pdf.usaid.gov/pdf_docs/PNADO347.pdf

——————————————————————————–

Date Mar 2005
Title Exploratory study on household energy practices, indoor air pollution and health perceptions in southern Philippines
Affiliated Orgs. Winrock International | U.S. Agency for International Development (USAID)
Author Saksena, Sumeet | Subida, Ronald | et al.
http://pdf.usaid.gov/pdf_docs/PNADO854.pdf

——————————————————————————–
Date Mar 2004
Title Household energy, indoor air pollution and health impacts : status report for Nepal
Affiliated Orgs. Winrock International Nepal | U.S. Agency for International Development (USAID)
http://pdf.usaid.gov/pdf_docs/PNADO853.pdf

——————————————————————————–
Date Dec 2002
Title Testing behaviours to reduce child exposure to indoor air pollution in rural South Africa
Affiliated Orgs. Medical Research Council of South Africa | Academy for Educational Development, Inc. (AED) | Manoff Group, Inc. | USAID. Bur. for Global Health. Ofc. of Health, Infectious Diseases, and Nutrition
Author Barnes, Brendon | Mathee, Angela
http://pdf.usaid.gov/pdf_docs/PNACW525.pdf

——————————————————————————–
Date Jul 2002
Title Identification of behavioural intervention opportunities to reduce child exposure to indoor air pollution in rural South Africa
Affiliated Orgs. Medical Research Council of South Africa | Academy for Educational Development, Inc. (AED) | Manoff Group, Inc. | USAID. Bur. for Global Health. Ofc. of Health and Nutrition
Author Barnes, Brendon | Mathee, Angela
http://pdf.usaid.gov/pdf_docs/PNACW524.pdf

——————————————————————————–
Date 2002
Title Addressing the links between indoor air pollution, household energy and human health
Affiliated Orgs. World Health Organization (WHO) | U.S. Agency for International Development (USAID)
Author Trevelyan, Joanna, ed.
http://pdf.usaid.gov/pdf_docs/PNACS621.pdf

——————————————————————————–

Date Apr 2001
Title Understanding household demand for indoor air pollution control in developing countries
Affiliated Orgs. USAID. Bur. for Global Programs, Field Support, and Research. Center for Population, Health and Nutrition. Ofc. of Health and Nutrition | World Health Organization (WHO)
Author Larson, Bruce A. | Rosen, Sydney
http://pdf.usaid.gov/pdf_docs/PNACN656.pdf

——————————————————————————–

Date 7 May 2000
Title The burden of disease from indoor air pollution in developing countries : comparison of estimates
Affiliated Orgs. USAID. Bur. for Global Programs, Field Support, and Research. Center for Population, Health and Nutrition. Ofc. of Health and Nutrition | World Health Organization (WHO)
Author Smith, Kirk R. | Mehta, Sumi
http://pdf.usaid.gov/pdf_docs/PNACN654.pdf

——————————————————————————–
Date [2000]
Title Household benefits of indoor air pollution control in developing countries
Affiliated Orgs. USAID. Bur. for Global Programs, Field Support, and Research. Center for Population, Health and Nutrition. Ofc. of Health and Nutrition | World Health Organization (WHO)
Author Larson, Bruce A. | Rosen, Sydney
http://pdf.usaid.gov/pdf_docs/PNACN655.pdf

——————————————————————————–

Date Dec 1998
Title Broad-search annotated bibliography on acute respiratory infections (ARI) and indoor air pollution (with emphasis on children under five in developing countries)
Affiliated Orgs. Camp Dresser and McKee, Inc. (CDM) | USAID. Bur. for Global Programs, Field Support, and Research. Center for Population, Health and Nutrition. Ofc. of Health and Nutrition
Author Kammen, Daniel M. | Wahhaj, Gemini | Yiadom, Maame Yaa
http://pdf.usaid.gov/pdf_docs/PNACP670.pdf

——————————————————————————–

Date Dec 1997
Title An annotated bibliography on prevention of acute respiratory infections (ARI) and indoor air pollution (with emphasis on children in developing countries)
Affiliated Orgs. Camp Dresser and McKee, Inc. (CDM) | USAID. Bur. for Global Programs, Field Support, and Research. Center for Population, Health and Nutrition. Ofc. of Health and Nutrition
Author McCracken, John P. | Smith, Kirk R.
http://pdf.usaid.gov/pdf_docs/PNACP669.pdf

——————————————————————————–

Date Dec 1984
Title Evaluation of RCUP’s improved cookstove program with special emphasis on indoor air pollution samplingAffiliated Orgs. South-East Consortium for International Development (SECID). Center for Women in Development | USAID. Bur. for Program and Policy Coordination. Ofc. of Women in Development
Author Reid, Holly F.
http://pdf.usaid.gov/pdf_docs/PNAAW938.pdf

PAKISTAN: Smoke-free Stoves A Godsend for Village Women

THATTA, Pakistan, Feb 25 (IPS) – Forty-something and unlettered, Sona Siddiqi never imagined she would become the most sought-after woman in her village of Ramzan Katiar.

Here in the Union Council Gharo of Thatta district in Sindh province, some 125 kilometres from the southern port city of Karachi, Siddiqi is happily making a living by building earthenware stoves for the villagers.

No ordinary stoves, these are godsend for rural women. The low-cost elongated stoves with two cells help save precious fuel wood in an area already stripped of trees. They are also a boon to women such as Rozan Nazar, who no longer have to walk five km, at times more, every day to collect firewood.

Octogenarian Fatema Hasan recalled that there once was a jungle around her village. “We didn’t have to walk that far. But today these women have to walk such distances because we cut down trees and did not plant any to replace them,” said Hasan.

On the average, a woman would be spending 15 hours a week collecting wood. “It used to take me between two and three hours just to collect wood which is good for a day, sometimes two,” said Nazar. “You can’t imagine how much of a relief this is. My life has eased so much.”

The other women nod in agreement. They spend the extra time they get doing embroidery, chatting with each other. “I love that! We never had time to do that earlier!” Nazar exclaimed.

Siddiqi is enjoying being in the limelight for her stoves: “I didn’t know I could be good at anything.”

She first learnt about the energy-efficient, smokeless stoves through a team from the non-government Indus Development Forum (IDF) that came to their village to do a demonstration. “I volunteered to construct one after they demolished their sample,” narrated Siddiqi.

This was nine months ago. She has so far constructed 16 stoves, and for every stove she receives 50 Pakistani rupees (58 U.S. cents) from the forum.

It takes her half a day to build a stove, including digging up the soil, mixing it with other materials and then installing the stove. “It takes three days for it to be completely dry,” she said.

Each stove uses about 15 kilogrammes of soil mixed with rice husk, wheat straw and donkey excreta. “It has to be donkey dung, not buffalo, because the latter burns and is not strong enough to sustain heat,” said Javed Shah, the man who invented the smokeless stove.

“It’s not rocket science, really,” said Shah, a technical adviser with the Aga Khan Planning and Building Services (AKPBS), a non-government organisation that works for the improved living conditions of communities.

Apart from soil, making the smokeless stoves also involves using the wooden template that is provided by the IDF, two empty tin canisters, a small plastic tub, an empty plastic litre-size soda bottle and a clay pipe that acts as a chimney.

“Training people, especially women, was part of the project,” said Hameed Sabzoi, IDF director.

The project was sponsored by the small grants programme of the Global Environment Facility of the United Nations Development . Under the one-year project from December 2008 to 2009, IDF had pledged to install 1,000 stoves in 15 villages in Gharo. The union council has a population of about 18,000 to 20,000 and comprises 35 villages with 50 or more households each.

The organisation at first wanted to charge 50 rupees for the installation of each stove, but soon realised that the poor villagers could not pay even the small amount. “We then decided to provide the stoves for free,” said IDF’s Sabzoi.

Shah first came up with the idea of energy-efficient metal stoves for the northern areas of Pakistan in 1985. “Conditions like asthma and eye infections among women and children were phenomenal in that area,” he said. “We realised it was due to smoke and soot.”

Biomass fuel – wood, crop residues and animal dung – is used in four-fifths of households in Pakistan and is a major source of indoor air pollution when burnt for cooking, for providing heat and lighting up homes, according to Sabzoi.

In 1987, while working in the villages of Sindh’s coastal area, Shah realised that women were facing similar health problems there. “But the weather did not permit the use of metal stoves. It would get very hot in these villages in summer,” he said.

So, Shah came up with stoves that used local soil.

“We succeeded in installing some 890 stoves (in the 15 villages in Gharo),” said Sabzoi.

Noor Khatoon, a 40 year-old mother of four, said she preferred the new stove: “It takes less time for the food to get cooked than in the traditional one.”

Her cousin Dhaniani will get a smoke-free stove after the family finishes reconstructing their home, which was flooded during heavy rains last year. When she tried cooking on Khatoon’s stove, she found that it took almost half the usual time and used very little wood.

The food was tastier too, specially the roti, Khatoon added. “That’s because the heat is evenly distributed all around the pan, unlike in the traditional one,” she explained.

Some residents have added further innovations in their stoves. A copper coil connected to the side of the combustion chamber and connected to a barrel of water warms the water so it can be used for bathing especially during winter, said Sabzoi.

Roma Juma, 37, was using the energy-efficient stove long before the IDF team came to her village in Mohammad Hashim Katchi Mundro. She has warm water available all the time. The seamstress now takes orders and builds stoves for her neighbours.

“I did it for free in the beginning, but when more and more women started coming with similar requests, I decided to charge them,” said Juma. She charges 100 rupees (1.17 dollars) for her labour and has so far built about 150 stoves.

Her relatives in Karachi have asked her to build them some too. “They say their gas and electricity bills have skyrocketed, and they want me to go there and install the stoves for them,” she chuckled.

An evaluation by the Aga Khan services in 2005, called the smoke-free stoves a “runaway bestseller” that has helped reduce wood use by 40 to 45 percent.

Masood Mahesar, a development worker and former provincial manager at AKPBS-Pakistan, said more than 10,000 stoves have been installed in Sindh’s Thatta, Badin, Hyderabad and Matiari districts. “A few thousand have also been replicated by the communities themselves,” he told IPS.

But this is a drop in the ocean in a region of 50,000 villages. Thousands remain unaware of the stove and either cut trees or pay 250 rupees (nearly 3 dollars) for 40 kilos of expensive fuel wood.

Source – http://www.propoor.org/news/?n=36192

Lighting Vanuatu

March 29, 2010 · 0 comments

Over the past year or so, a new range of low-cost, small, battery-charged devices – for lighting and mobile phone charging – has appeared on the market, including in Vanuatu. Commercial retail prices in Vanuatu are variously US$20-100, depending on product type.

These products are described as Pico-solar. They usually consist of a solar panel and a combination LED (Light Emitting Diode) light and in-built battery. These small systems are compact, robust, affordable, and are ideal for rural environments.

Leaflet for more information- Lighting-Vanuatu

Individuals and/or organizations interested in ‘Lighting Vanuatu’ and/or helping to spread it to other Pacific Island Countries are encouraged to contact David Stein, Team Leader of VANREPA/Green Power, by phone on 24610 or by email at solarsolutions@vanuatu.com.vu

A non-governmental organisation, E + Co, plans to introduce new cooking stoves and water filtration technologies in Tanzania in a mission to reduce greenhouse gase emission.

Speaking at a stakeholders meeting in Dar es Salaam yesterday, E+Co manager Erick Wurster said the project is also meant to curb deforestation and improve air quality by manufacturing or importing charcoal and wood fuel efficient biomass stoves.

Mr Wurster explained that according to World Health Organisation (WHO), it is estimated that 27,000 deaths occur every year in Tanzania from firewood and charcoal stoves and destroying an average of 121,000 hectares of forests.

He said that air pollution from cooking with solid fuel on primitive stoves was a key risk factor in childhood acute respiratory infections such as pneumonia as well as many other respiratory, cardiovascular and ocular diseases.

He said the problem is set to amplify given that more than 95 per cent of Tanzania’s population relies on dangerous and inefficient cooking fuel.

Mr Wurster said that the new technology will include `Envirofit stoves’ and `Quality Jiko’ to be imported from China. Later, he said, Tanzanians would be trained on how to manufacture the stoves locally. He said after introduction of the stoves, the project will extend to water filtration systems, replacing the need to boil water using firewood.

He said his organisation decided to introduce the technology in Tanzania since non-renewable consumption of biomass for cooking and boiling water in the country, leads to deforestation and indoor air pollution which has significant public health and environmental implications.

He said the organisation aimed at empowering local small and medium enterprises to supply clean, modern and affordable energy for households and business use.

Source – The Citizen

Humble cookstoves reduce deadly toll of smoke on young lives

For as little as three dollars, stoves can save lives, mitigate climate change and reduce deforestation in developing countries Nearly half the world’s  households, around three billion people worldwide, eat food cooked on traditional stoves and fires that kill around 1.6 million people a year —- most of them children.

A new report says that a global programme to produce half a billion improved stoves could convert the world’s poor to safer cooking, save hundreds of thousands of young lives a year, and at the same time cut global greenhouse gas emissions by the equivalent of up to one billion tonnes of CO2 a year. Traditional, inefficient stoves make kitchens highly dangerous for the world’s most vulnerable people – women and children’s lungs in particular are subjected to a toxic mix of smoke and gases, leading to a silent epidemic of disease.

Household smoke is a major cause of childhood pneumonia, the biggest cause of death among children worldwide, and is strongly linked to chronic lung disease among women. Cooking fires and stoves are also significant contributors to climate change, through their emissions of CO2, other gases and particulates. Soot is now thought to be responsible for up to a fifth of the warming effect of man-made pollution. The report, ‘Stoking up a cookstove revolution: the secret weapon against poverty and climate change’ published by the Ashden Awards for Sustainable Energy, gives many examples of stoves programmes across the developing world that provide affordable, robust ‘improved’ stoves that burn less fuel, cook faster and approximately halve harmful smoke emissions. Many use a chimney to remove smoke and gases from the kitchen, improving combustion.

For further information and a PDF of the report, “Stoking up a cook-stove revolution: the secret weapon against poverty and climate change” written by Fred Pearce, contact Juliet Heller +44 (0)1621 868083 or +44 (0)7946 616150.  juliet.heller@ashdenawards.org

Source – http://uk.oneworld.net/article/view/164863/1/5795

Thorax. 2010 Mar;65(3):221-8.

COPD and chronic bronchitis risk of indoor air pollution from solid fuel: a systematic review and meta-analysis.

Kurmi OP, Semple S, Simkhada P, Smith WC, Ayres JG.

Institute of Occupational and Environmental Medicine, School of Population and Health Sciences, University of Birmingham, Birmingham B15 2TT, UK.  o.kurmi@bham.ac.uk.

Background – Over half the world is exposed daily to the smoke from combustion of solid fuels. Chronic obstructive pulmonary disease (COPD) is one of the main contributors to the global burden of disease and can be caused by biomass smoke exposure.  However, studies of biomass exposure and COPD show a wide range of effect sizes. The aim of this systematic review was to quantify the impact of biomass smoke on the development of COPD and define reasons for differences in the reported effect sizes.

Methods – A systematic review was conducted of studies with sufficient statistical power to calculate the health risk of COPD from the use of solid fuel, which followed standardised criteria for the diagnosis of COPD and which dealt with confounding factors. The results were pooled by fuel type and country to produce summary estimates using a random effects model. Publication bias was also estimated.

Results – There were positive associations between the use of solid fuels and COPD (OR=2.80, 95% CI 1.85 to 4.0) and chronic bronchitis (OR=2.32, 95% CI 1.92 to 2.80). Pooled estimates for different types of fuel show that exposure to wood smoke while performing domestic work presents a greater risk of development of COPD and chronic bronchitis than other fuels.

Conclusion – Despite heterogeneity across the selected studies, exposure to solid fuel smoke is consistently associated with COPD and chronic bronchitis. Efforts should be made to reduce exposure to solid fuel by using either cleaner fuel or relatively cleaner technology while performing domestic work.