Bilkis A. Begum, Samir K. Paul, M. Dildar Hossain, Swapan K. Biswas, Philip K. Hopke,

Indoor air pollution from particulate matter emissions in different households in rural areas of Bangladesh,

Building and Environment, Volume 44, Issue 5, May 2009, Pages 898-903, ISSN 0360-1323, DOI: 10.1016/j.buildenv.2008.06.005.

Indoor air pollution from the combustion of traditional biomass fuels (wood, cow dung, and crop wastes) is a significant public health problem predominantly for poor populations in many developing countries. It is particularly problematic for the women who are normally responsible for food preparation and cooking, and for infants/young children who spend time around their mothers near the cooking area. Airborne particulate matter (PM) samples were collected from cooking and living areas in homes in a rural area of Bangladesh to investigate the impact of fuel use, kitchen configurations, and ventilation on indoor air quality and to apportion the source contributions of the measured trace metals and BC concentrations. Lower PM concentrations were observed when liquefied petroleum gas (LPG) was used for cooking. PM concentrations varied significantly depending on the position of kitchen, fuel use and ventilation rates. From reconstructed mass (RCM) calculations, it was found that the major constituent of the PM was carbonaceous matter. Soil and smoke were identified as components from elemental composition data. It was also found that some kitchen configurations have lower PM concentrations than others even with the use of low-grade biomass fuels. Adoption of these kitchen configurations would be a cost-effective approach in reducing exposures from cooking in these rural areas.

Shuxiao Wang, Wei Wei, Li Du, Guanghui Li, Jiming Hao,

Characteristics of gaseous pollutants from biofuel-stoves in rural China,

Atmospheric Environment, In Press, Corrected Proof, Available online 2 June 2009, ISSN 1352-2310, DOI: 10.1016/j.atmosenv.2009.05.040.

The research team analyzed the emission characteristics of gaseous pollutants, including volatile organic compounds (VOCs), from biomass combustion in improved stoves in rural China. The research included measurements from five biofuels and two stove types in the months of January, April, and September. The measurements were conducted according to U.S. EPA Method 25 using a collection system with a cooling device and two-level filters. CO, CO2, NOx, CH4 and THC analyzers were used for in-field, real-time emission measurements. The emission data indicate that gaseous pollutants were emitted at higher concentrations in the early combustion stage and lower concentrations in the later stage. CH4 and THC, as well as CO and CO2, presented positive relationships during the whole entire combustion process for all tests. The chemical profiles of flue gas samples were analyzed by GC/MS and GC/FID/ECD. Aromatics, carbonyls, and alkenes & alkynes dominated the VOC emissions, respectively accounting for 37%, 33%, and 23% of total VOC emissions by volume. Benzene was the most abundant VOC species, consisting of 17.3 +/- 8.1% of VOCs, followed by propylene (11.3 +/- 3.5%), acetone (10.8 +/- 8.2%), toluene (7.3 +/- 5.7%) and acetaldehyde (6.5 +/- 7.3%). Carbon mass balance approach was applied to calculate CO, CO2, CH4, NOx, and VOC species emission factors. This analysis includes a discussion of the differences among VOC emission factors of different biofuel-stove combinations.

Shichang Kang, Chaoliu Li, Feiyue Wang, Qianggong Zhang, Zhiyuan Cong,

Total suspended particulate matter and toxic elements indoors during cooking with yak dung,

Atmospheric Environment, In Press, Accepted Manuscript, Available online 21 June 2009, ISSN 1352-2310, DOI: 10.1016/j.atmosenv.2009.06.015.

Many herders in the Tibetan Plateau still inherit the traditional lifestyle, including living in tents and burning yak dung for fuel. This short correspondence reports a pilot study on indoor air quality in the nomadic tents in the Nam Co region, inland Tibetan Plateau. The results showed very high concentrations of total suspended particles (TSP), averaging at 4.45 mg/m3 during the cooking/heating period (with daily value of 3.16 mg/m3). Elevated concentrations of toxic element Cd, As and Pb were also found within the tents, averaging 3.16 [mu]g/m3, 35.00 [mu]g/m3, and 81.39 [mu]g/m3 for a day, respectively, which were not only far higher than those of WHO indoor air quality guidelines, but also more than 104-106 times higher than the outdoor air level in the Nam Co area. The study raises serious concerns over the health of Tibetan herders following their long-term exposure to the tent air.

LIJIANG, China (CNN) — In the northwest of China’s mountainous Yunnan province, among the world’s most biodiverse areas, a green revolution is under way among rural residents.

Zhang Chengui was the first to adopt alternative energy in Yunnan’s Meiquan Village.

1 of 3 In Meiquan Village near Lashi Lake, Zhang Chengui says he has been able to maximize profits by spending more time growing crops since installing a biogas digester-greenhouse, solar water heater, energy-efficient stove and rain-collecting cistern. He installed them with loans from the bank and grants from The Nature Conservancy, becoming in 2003 the first in his village to adopt alternative energy.

Since then, his income has tripled to 40,000-50,000 yuan ($5,800-$7,300), he said.

The region, which sees the crossing of three of Asia’s great rivers — the Yangtze, Mekong and Salween — is a poor one, with firewood traditionally being the source for cooking, heating and housing for half a million households. However, despite a decade-long ban on commercial logging, such a firewood-dependent lifestyle poses a threat to Yunnan’s forests and its more than 17,000 plants and wildlife, including the endangered golden monkey.

Zhang’s status as Meiquan’s village leader made him a natural choice to launch the alternative energy project there. By enlisting him as an ally, The Nature Conservancy was able to slowly persuade other villagers, who would otherwise be hesitant to invest their limited money.

Hundreds of households in the area have followed his lead. Under the Nature Conservancy’s alternative energy project, 820 households adopted biogas digesters, and 600 adopted solar water heaters, many of them choosing both, according to Zhu Li, communications manager at the nongovernmental organization’s Kunming office.

The Nature Conservancy says it and partners have taken the alternative energy project to 420 villages in Yunnan, installing more than 14,000 biogas units, energy efficient stoves and solar water heating systems. Most of those villages are remote and had relied on nearby forests as opposed to a power grid.

To tap money for such devices, villagers can receive small loans under the GreenVillage Credit program. Part of the United Nations Environment Programme’s China Rural Energy Enterprises Development (CREED) initiative, the program has successful precedents in five African nations — Senegal, Mali, Ghana, Zambia and Tanzania — and northeast Brazil. The approach, developed by clean energy investor E+Co, helps entrepreneurs take risks in an otherwise emerging sector in order to gain public trust and attract commercial investment.

The goal is to overcome the hurdles generally posed by limited money and training in such remote areas — and reduce fuel wood consumption by 75 percent. The initiative — which links the government with nongovernmental organizations and financial institutions — harnesses financing, alternative energy sources, entrepreneurship and training into income-generating activities.

In addition, the CREED initiative aims to provide alternatives for rural areas where women and children shoulder the burden of collecting firewood and wood burning. The number of hours spent daily, as well as the detrimental health effects of wood burning and indoor pollution — such as eye and respiratory ailments — risk contributing to the persistence of the area’s poverty.

In a report last year (“Investing in a Climate for Change”), the U.N. Environment Programme said that finance is “essential” in addressing climate change. “Without substantial and sustained investment in clean energy and other measures now, the reality of a global economy free of climate change impacts will remain a distant dream,” the report noted.

For most Yunnan households, whose average yearly income is a few hundred dollars, a biogas digester ($150-$300), a solar water heater ($400), or an efficiency stove ($40-80) is too costly, The Nature Conservancy points out.

Under GreenVillage Credit, households can apply for loans up to 10,000 yuan ($1460) after mapping out their income-generating activity from such devices. To offset any default, 5 percent of the loan is deposited at a bank as a guarantee, and a solidarity group of five to eight households is formed to share responsibility for the member’s loan repayments. In return, participants get technical support and have about 18 months to pay the loan off.

Nearly 600 households have been able to tap more than $300,000 in loans to purchase such energy-efficient systems and generate income, thanks to GreenVillage Credit.

Whereas Zhang’s family used to spend hours seeking, chopping and carrying firewood, the switch to alternative energy has enabled them to save the equivalent of 100 working days, he estimated. Thanks to the solar heater, a shower is a daily possibility, and the biogas digester — which converts human and pig waste to a clean gas that can be pressurized — has enabled cooking and lighting. More time is then left to devote to his income-generating greenhouse, which uses waste slurry left over from the biogas digester as fertilizer for his grapes, strawberries, apples, plums, cherries, peaches, eggplant, cucumber, tomatoes and squash.

Thanks to increased income, his children were freed up to attend the university, said the 53-year-old Zhang, whose own education ended with high school. Zhang’s children have since graduated; his son became a magazine editor, while his daughter became a government official, Zhang said.

“What we have today cannot be separated from alternative energy,” Zhang told journalists visiting his home last year. His life’s goal, he said, was to educate the next generation well and see an improvement in his grandchildren’s lives.

Elsewhere in China, biogas projects have proven more popular than in Yunnan, where colder temperatures generally require a greenhouse to cover the units.

As of the end of 2007, more than 26.5 million rural households were using household biodigesters, saving the equivalent of 44 million tons of CO2 emissions, according to China’s State Council Information Office. The number is notable for a country criticized for its environmental record while trying to bridge a wide income gap between urban dwellers and rural residents who lack access to modern energy services.

Source – CNN

PCIA Bulletin Issue 20, July 2009. (pdf, 494KB)

Health impacts associated with exposure to indoor air pollution include acute respiratory infections (ARI), including pneumonia; chronic obstructive pulmonary disease (COPD); lung cancer (for users of open coal stoves); cataracts; tuberculosis; asthma; and adverse pregnancy outcomes (stillbirth, low birthweight). Because of these and other serious health impacts associated with household energy use, and the interest in this topic generated at the 4th Biennial Partnership for Clean Indoor Air Forum held in Kampala, Uganda in March 2009, this issue of the Bulletin focuses on highlighting recent research findings on some of these serious health impacts.

Household Energy Health Impacts
Feature Articles:
-IAP and Cardiovascular Impacts
-Biomass and HIV
-IAP and Children’s Health
-IAP and Lung Function Testing
-CO Emissions and Stove Testing
-IAP and Visual Impairment
-Biomass and Burns and Falls
-ARI Reduction in Pakistan
-Health Impact Tracking in India
Happenings
What’s New
Fact Box
Health Impacts QUIZ!

Reeep softens financial crisis for renewables and energy efficiency in the developing world
The Renewable Energy and Energy Efficiency Partnership (REEEP) has provided € 667,500 in seed funding for eight new finance projects to accelerate the clean energy market in the developing world.  Piloting innovative finance methods is one of the Vienna-based NGO’s key priorities in its small-scale project funding, designed to have a wide ripple effect.Microfinance facilities are a way to open up access to energy services for the rural poor. REEEP will work in Uganda to help microfinance institutions (MFIs) to establish small businesses selling solar, biogas and high-efficiency cookstoves, and to provide loans to 5000 consumers who buy them.  In parallel, another REEEP project will help establish a network of retail outlets to sell energy-efficient CFLs, pressure cookers, stoves and solar lanterns in villages of the Indian state of Karnataka, and structure guarantees with MFIs to provide financing to end users.

A successful microfinance mechanism is PFAN (Private Financing Advisory Network), a finance coaching and investor matchmaking service that works well in many developing markets as well as India and China. A new REEEP project will expand PFAN activities to Uganda and Mozambique, and aim to attract between $10-60 million of funding to clean energy projects in those two countries during its first year.

Establishing microfinancing systems on the islands of Fiji, Vanuatu and Samoa over the next 15 months is the aim of the PREM (Pacific Renewable Energy and Microfinance) project. It kicks off with a baseline study on renewables and energy efficiency in these countries, and following this, a set of training tools will be created to assist MFIs in developing their own sustainable loan products.

In Brazil, REEEP will target the agricultural sector in a project combining international and local sources of financing to make solar water pumps for irrigation, solar dryers for fruits, and bio-digestors for agricultural waste available to small farmers.  

With microfinancing at one end of the spectrum, other REEEP projects will aim to unlock the potential of large-scale investment in renewables.  Institutional investors such as pension funds, insurance companies, and savings and investment banks see high risks associated with the emerging markets and with renewable energy.  A REEEP project will seek to develop risk mitigation strategies and financing products through intermediaries such as E+Co, to attract these major players to the renewables market. 

In a similar vein, REEEP has also provided funding for the establishment of a Public-Private Mezzanine Finance facility for renewable energy projects in Morocco, Tunisia and Egypt. A shortage of investor equity capital and government subsidies are barriers to project financing renewable energy projects in the region. Mezzanine finance is a ‘quasi-equity’ structure that could help alleviate the current lack of developer equity.

Finally, a REEEP project together with the China Development Bank will develop new financial tools and risk mitigation instruments for renewable energy project finance, and help build a network of market-based banks interested in renewable energy project finance.

“We are convinced that targeted interventions like these will help to mobilise funding for renewables and energy effiency in the emerging markets,” said Marianne Osterkorn, Director General of REEEP.

Source – ScienceDaily (June 30, 2009) — Particulate pollution thought to be holding climate change in check by reflecting sunlight instead enhances warming when combined with airborne soot, a new study has found. 

Like a black car on a bright summer day, soot absorbs solar energy. Recent atmospheric models have ranked soot, also called black carbon, second only to carbon dioxide in potential for atmospheric warming. But particles, or aerosols, such as soot mix with other chemicals in the atmosphere, complicating estimates of their role in changing climate.

“Until now, scientists have had to assume how soot is mixed with other chemical species in individual particles and estimate how that ultimately impacts their warming potential,” said Kimberly Prather, professor in the Department of Chemistry and Biochemistry and the Scripps Institution of Oceanography at the University of California, San Diego. “Our measurements show that soot is most commonly mixed with other chemicals such as sulfate and this mixing happens very quickly in the atmosphere. These are the first direct measurements of the optical properties of atmospheric soot and allow us to better understand the role of soot in climate change.”

Prather and Ryan Moffet, a former graduate student at UC San Diego who is now at the Lawrence Berkeley National Laboratory, measured atmospheric aerosols over Riverside, California and Mexico City. Using an instrument that measures the size, chemical composition and optical properties of aerosols in real time, they showed that jagged bits of fresh soot quickly become coated with a spherical shell of other chemicals, particularly sulfate, nitrate, and organic carbon, through light-driven chemical reactions.

Within several hours of sunrise, most of the atmospheric carbon they measured had been altered in this way, they report in the Proceedings of the National Academy of Sciences online the week of June 29.

Particles of sulfate or nitrate alone reflect light, and some have proposed pumping sulfate aerosols into the atmosphere to slow climate change. But these chemicals play a different role when they mix with soot.

“The coating acts like a lens and focuses the light into the center of the particle, enhancing warming,” Prather said. “Many people think sulfate aerosols are a good thing because they are highly reflective and cool our planet. However we are seeing that sulfate is commonly mixed with soot in the same particles, which means in some regions sulfate could lead to more warming as opposed to more cooling as one would expect for a pure sulfate aerosol.”

Their measurements showed that in the atmosphere the lens-like shell of sufate and nitrate enhances absorption of light by coated soot particles 1.6 times over pure soot particles.

Soot comes from fires, including those used to cook food and clear agricultural fields, as well as burning of diesel fuel in trucks and ships. Simple measures such as providing better cook stoves with more complete combustion to those in developing countries would help reduce atmospheric soot levels.

Efforts to reduce soot would pay off soon. Unlike carbon dioxide, which lingers in the atmosphere for centuries, soot falls from the sky in a matter of days to weeks, making the reduction of soot a quicker option for slowing down climate change.

“While reducing CO2 concentrations is extremely important, changes we make today will not be felt for quite a while, whereas changes we make today on soot and sulfate could affect our planet on timescales of months,” Prather said. “This could buy us time while we grapple with the problems of reducing carbon dioxide and other greenhouse gases.”

Hilde M. Toonen,

Adapting to an innovation: Solar cooking in the urban households of Ouagadougou (Burkina Faso), IN: Physics and Chemistry of the Earth, Parts A/B/C, Volume 34, Issues 1-2, Sustainable Water Solutions, 2009, Pages 65-71, ISSN 1474-7065, DOI: 10.1016/j.pce.2008.03.006.

Most households in Sub-Saharan Africa rely on wood as primary energy source. The availability of wood is decreasing and deforestation is a major ecological problem in Sub-Saharan Africa. The scarcity of wood is demanding for a sustainable solution. The sun seems to provide a good alternative. Solar energy is free, without unhealthy smoke or chances to burns. The idea of using solar energy for cooking is not new: many different techniques have already been tested. Most variants are expensive, and therefore not available for most families in Sub-Saharan Africa. A cheap solar cooking device is the CooKit, a cardboard panel cooker covered with aluminium foil.

In the adaptation to the CooKit, as to all innovations, it is important that the users are convinced of the advantages. An important step in the adaptation process is learning how to use the cooking device; the best way to do this is by home practice. Monitoring and evaluating the real use is needed, for it is interesting to know if the CooKit is actually used, and also to find out how women have implemented the new technique in their kitchens.

In 2005, the SUPO foundation started a project in Burkina Faso: Programme Energie Solaire Grand-Ouaga (PESGO). The aim of PESGO is to introduce the CooKit in the urban households in Ouagadougou by providing training sessions and home assistance. In this paper, a mid-term review on this small-scale cooking project is presented. The possibilities and challenges of solar cooking are outlined, taking the urban context of Ouagadougou in account. In PESGO, dependence on weather conditions is found to be one of the challenges: if sunrays are blocked by clouds or dust in the air, the cooking will be slowed down. The CooKit cannot replace firewood entirely, and a complementary element has to be found. SUPO is exploring the use of Jatropha oil as a complement to the CooKit. The Jatropha plant is drought tolerant and its fruits contain oil which can be used as fuel substitute. Further research on its use is interesting, because the combination of the CooKit and Jatropha oil seems to have high potential in the kitchens of West-Africa.

Bothwell Batidzirai, Erik H. Lysen, Sander van Egmond, Wilfried G.J.H.M. van Sark,

Potential for solar water heating in Zimbabwe, IN:  Renewable and Sustainable Energy Reviews, Volume 13, Issue 3, April 2009, Pages 567-582, ISSN 1364-0321, DOI: 10.1016/j.rser.2008.01.001.

This paper discusses the economic, social and environmental benefits from using solar water heating (SWH) in Zimbabwe. By comparing different water heating technology usage in three sectors over a 25-year period, the potential of SWH is demonstrated in alleviating energy and economic problems that energy-importing countries like Zimbabwe are facing. SWH would reduce coincident electricity winter peak demand by 13% and reduce final energy demand by 27%, assuming a 50% penetration rate of SWH potential demand. Up to $250 million can be saved and CO2 emissions can be reduced by 29% over the 25-year period. Benefits are also present at individual consumer level, for the electricity utility, as well as for society at large. In the case of Zimbabwe, policy strategies that can support renewable energy technologies are already in current government policy, but this political will need to be translated into enhanced practical activities. A multi-stakeholder approach appears to be the best approach to promoting widespread dissemination of SWH technologies.

Bilkis A. Begum, Samir K. Paul, M. Dildar Hossain, Swapan K. Biswas, Philip K. Hopke,

Indoor air pollution from particulate matter emissions in different households in rural areas of Bangladesh, IN: Building and Environment, Volume 44, Issue 5, May 2009, Pages 898-903, ISSN 0360-1323, DOI: 10.1016/j.buildenv.2008.06.005.

Indoor air pollution from the combustion of traditional biomass fuels (wood, cow dung, and crop wastes) is a significant public health problem predominantly for poor populations in many developing countries. It is particularly problematic for the women who are normally responsible for food preparation and cooking, and for infants/young children who spend time around their mothers near the cooking area. Airborne particulate matter (PM) samples were collected from cooking and living areas in homes in a rural area of Bangladesh to investigate the impact of fuel use, kitchen configurations, and ventilation on indoor air quality and to apportion the source contributions of the measured trace metals and BC concentrations. Lower PM concentrations were observed when liquefied petroleum gas (LPG) was used for cooking. PM concentrations varied significantly depending on the position of kitchen, fuel use and ventilation rates.

From reconstructed mass (RCM) calculations, it was found that the major constituent of the PM was carbonaceous matter. Soil and smoke were identified as components from elemental composition data. It was also found that some kitchen configurations have lower PM concentrations than others even with the use of low-grade biomass fuels. Adoption of these kitchen configurations would be a cost-effective approach in reducing exposures from cooking in these rural areas.