The Lancet, 25 November 2009doi:10.1016/S0140-6736(09)61713

Public health benefits of strategies to reduce greenhouse-gas emissions: household energy

Dr Paul Wilkinson FRCP, Prof Kirk R Smith PhD, Prof Michael Davies PhD, Heather Adair BS , Prof Ben G Armstrong PhD , Mark Barrett PhD, Nigel Bruce PhD, Prof Andy Haines FMedSci, Ian Hamilton MSc, Prof Tadj Oreszczyn PhD, Ian Ridley PhD, Cathryn Tonne ScD, Zaid Chalabi PhD

Energy used in dwellings is an important target for actions to avert climate change. Properly designed and implemented, such actions could have major co-benefits for public health. To investigate, we examined the effect of hypothetical strategies to improve energy efficiency in UK housing stock and to introduce 150 million low-emission household cookstoves in India.

Methods similar to those of WHO’s Comparative Risk Assessment exercise were applied to assess the effect on health that changes in the indoor environment could have. For UK housing, the magnitude and even direction of the changes in health depended on details of the intervention, but interventions were generally beneficial for health. For a strategy of combined fabric, ventilation, fuel switching, and behavioural changes, we estimated 850 fewer disability-adjusted life-years (DALYs), and a saving of 0·6 megatonnes of carbon dioxide (CO2), per million population in 1 year (on the basis of calculations comparing the health of the 2010 population with and without the specified outcome measures).

The cookstove programme in India showed substantial benefits for acute lower respiratory infection in children, chronic obstructive pulmonary disease, and ischaemic heart disease. Calculated on a similar basis to the UK case study, the avoided burden of these outcomes was estimated to be 12 500 fewer DALYs and a saving of 0·1—0·2 megatonnes CO2-equivalent per million population in 1 year, mostly in short-lived greenhouse pollutants. Household energy interventions have potential for important co-benefits in pursuit of health and climate goals.

November 21. 2009 9:30PM UAE – If you think you can avoid air pollution by staying indoors, think again.

Furniture, carpets, paints and air conditioning units can all pollute the air we breathe indoors, said an American researcher who is leading a project to study the air quality in 600 homes across the Emirates.

For the next four months, researchers will study each selected home for one week, installing air quality monitors to measure concentrations of potentially harmful pollutants.

The study follows a report last month that showed indoor air pollution was responsible for 250 deaths a year in the Emirates.

“It is an effort to find out what is happening to the population in the last 40 years as urbanisation has increased,” said Dr Karin Yeatts, an assistant professor at the University of North Carolina at Chapel Hill.

Dr Yeatts is heading a team of 68 researchers who will work in collaboration with the Environment Agency-Abu Dhabi and the UAE University’s department of community medicine.

While the UAE has been developing infrastructure and rules to control outdoor air quality, there are no guidelines or regulations for indoor air.

Among other things, the study aims to identify the most prevalent pollutants. Its results will be used to help develop a national strategy for environmental health.

The study, which already collected data from seven houses, will include homes in all seven emirates, and only the homes of UAE nationals.

The survey team will measure concentrations of seven pollutants. Two of them formaldehyde and toluene come primarily from indoor sources.

Formaldehyde, a probable human carcinogen known to cause severe allergic reactions, can be found in pressed-wood products, some types of foam insulation and tobacco smoke.

“Some types of furniture and carpets can [give off] formaldehyde,” Dr Yeatts said.

Toluene is emitted by solvents, paints, adhesives and other building materials.

The other five pollutants nitrogen dioxide, sulphur dioxide, carbon monoxide, hydrogen sulphide and particulate matter come primarily from outdoor air that filters inside.

A home’s proximity to industrial areas, major roads and construction activity can also affect the level of those pollutants in indoor air, Dr Yeatts said.

Barbara Roux, an air quality expert in Dubai, said the study was a good first step. She recommended that a committee be formed to identify pollutants of concern and group them in categories depending on the level of risk they pose.

“It is a huge responsibility and no one can do it alone,” said Mrs Roux, the chef executive of Air Environmental Solutions, a private firm.

In her native France, she said, air quality experts, health professionals, chemists and architects had worked together to identify a list of 56 prevalent pollutants.

“Every day we breathe an average of 15,000 litres of air that is mostly from enclosed locations where we spend up to 90 per cent of our time,” she said. “The average time spent indoors is even higher in the Gulf countries, for obvious reasons.

“Research shows that indoor air is three to 10 times more polluted than the outdoor air.”

The research teams will also gather information from residents about health complaints that could be attributed to air quality, and about their diets.

The study will not cover biological pollutants, which include hundreds of species of bacteria and mould-forming fungi. The World Health Organisation has connected biological pollutants to allergies and asthma.

Source – The National

Billions of pesos lost due to air pollution, says World Bank study

AIR POLLUTION is costing the economy billions of pesos in productivity loss and health care expense, according to a World Bank environmental repoRt on the Philippines, highlighting the urgency to adopt remedial measures from the government to the household levels.

In its country environmental analysis (CEA) published last Oct. 29, the multilateral lender said 1.5 million Filipinos of varying ages are afflicted with respiratory sickness annually due to outdoor air pollution (OAP) in urban areas, while almost a third of that number suffer from various illnesses due to indoor air pollution (IAP).

OAP-related illness alone is costing the economy some P950 million annually. “Productivity loss [income and time loss due to absence from work and household activities] is the largest category [P502 million], followed by personal costs for treatment of disease [P360 million],” the World Bank said. Governmental health care subsidy stood at P88 million, the report noted.

Major contributors to OAP are vehicular and industrial emission, the report said.

With the finding, the bank proposed interventions to include improving vehicle inspection and maintenance programs, shift from two-stroke to four-stroke tricycles, introduction of cleaner fuels and installation of pollution-control devices in vehicles, in addition to increasing investment in mass transport systems.

“Investments in additional mass transport systems such as electric trains will significantly reduce the public’s reliance on jeepneys and tricycles, which are notorious for outdoor air pollution emissions…,” it said.

Meanwhile, the bank estimates IAP cost at over P1.5 billion based on 2007 prices, including loss of income and time due to absence from work and household activities (47%), treatment to households (38%) and state health subsidy (15%).

The World Bank noted that IAP has a higher impact on poor households due to particulates from the use fuel-wood and other biomass residue for cooking.

The institution’s proposed interventions to reduce IAP include the use of improved stoves, cooking outside the house, and switching to cleaner fuel.

“The introduction of improved stoves has high economic returns in a range of household cooking environments. Likewise, switching to liquefied petroleum gas is also found to provide higher benefits than costs in households cooking indoors in poorly ventilated conditions,” it aid.

The CEA is a country-level diagnostics tool used by the World Bank to evaluate environmental priorities, implications of key policies, and capacity to address priorities.

Source – Business World

Shell Foundation has undertaken a comprehensive program of engagement in 111 villages in Shimoga and is partnering with the district and state administration to drive awareness on the third largest killer in the country, Indoor Air Pollution (IAP).

Bengaluru, Karnataka, November 19, 2009 /India PRwire/

  • Shell Foundation awareness campaign launched in 111 Villages in Shimoga district
  • Combined action with District Administration underway
  • Inter-ministerial committee mooted to plan for Indoor Air Pollution Free State
  • Toxic emissions and smoke from cooking claims 400,000 lives in India every year
  • In developing countries this makes Indoor Air Pollution the most lethal killer after malnutrition, unsafe sex and lack of safe water and sanitation.  59% of these deaths are women.

Shell Foundation has undertaken a comprehensive program of engagement in 111 villages in Shimoga and is partnering with the district and state administration to drive awareness on the third largest killer in the country, Indoor Air Pollution (IAP).

Shell Foundation has received support from the Chief Minister’s office on its proposal to appoint an inter-ministerial committee with participation of IAP experts, stove manufacturers, MFIs, NGOs and others to develop a blueprint for State action. The State Government has positively viewed Shell Foundation’s proposal to adopt a mission of turning Districts with high firewood usage into “IAP Free Districts”, starting with Shimoga as a model District.

The campaign currently in operation in the Shimoga district in Karnataka has received the support of relevant officials of the State and District administration namely Department of Rural Development and Panchayati Raj; Minister of Social Welfare; Deputy Commissioner, Shimoga District and CEO Zilla Parishad, Shimoga District. All the concerned departments are now working together with the Shell Foundation team to find ways to reach the message of reducing smoke in the kitchen across the district and eventually the state.

The campaign in Shimoga district is an initiative by Shell Foundation to focus on promoting the internationally-recognised, most effective and sustainable method for tackling IAP, namely ‘improved stoves’, which significantly reduce emissions and fuel use. At present, the program is taking the message to 111 villages in Shimoga district through a combination of on-ground static and interactive activities. The high intensity campaign is being conducted over a 90-day time period between October and January 2009.

The campaign is also being reached to the people through active support from the District Administration including the health and education infrastructure, village level health workers and demonstration of campaign for Gram Panchayats.

The current initiative follows a pilot campaign on IAP conducted by Shell Foundation in 2008 in the districts of Raichur, Koppal, Udupi and Mysore, which indicated that although small changes like ‘keeping the kitchen windows open’, ‘installing a chimney or ventilator’, ‘keeping children away from smoke’ or ‘use of dry firewood’ can make a big difference in reducing IAP, the final focus needs to be on motivating people to change behaviour, with a focus on improved stoves.

At a press conference on November 19, 2009 in Shimoga, Simon Bishop, Policy and Communications Manager for the Shell Foundation said that, “We are very pleased that the Government of Karnataka has endorsed the campaign on creating awareness on Indoor Air Pollution. Through this initiative in Shimoga we hope the activities we conduct will be a showcase for a campaign that we would eventually like to expand across southern India. Our basic concern is that women should not be dying as a result of cooking meals for their families. If we can convince families to adopt improved cook stoves we will begin to prevent this from happening.”

One person around the world dies every 20 seconds from the cumulative effects of IAP, resulting in approximately 1.5 million deaths per year, thus making IAP the fourth biggest killer in the world’s poorest countries, after malnutrition, unsafe sex and lack of safe water and sanitation. (Source: World Health Organization).

Shell Foundation has also developed the concept of ‘standardization of stoves’ to be able to directly connect the campaign with the improved stoves. The mark called ‘Symbol of trust’ (see top of release for symbol) will appear on the packaging and marketing materials of all improved stove manufacturers i.e. those that have passed rigorous tests on minimum emissions and fuel reduction standards as laid down by international bodies. At the local level, this mark will double-up as a ‘standards mark’ to indicate an improved stove that will reduce smoke levels by as much as 55%, while using at least 40% less fuel.

111 villages, with populations larger than 2000 people, will be covered in this campaign in the Shimoga district across its seven taluks namely Bhadravathi, Sagar, Sorab, Shimoga, Theerthahalli, Shikaripur and Hosanagara.

The campaign running through a stretch of 90 days includes an outdoor campaign that communicates the message through posters and wall paintings. The Village to Village campaign involves engaging local villagers through neighbourhood gatherings hosting a stream of mobile van campaigns, flip chart stories, street plays, interactive games and contests to give people a sense of involvement.

The campaign is being taken to the doorstep using the concept of Sustained Activist Householder who is an active local village lady visiting various households and informing the villagers about the problems of IAP and its solution – use of improved stoves standardised with the ‘mark of trust’ through flipchart stories and distribution of leaflets. Smoke-less Stove demos being conducted at weekly markets will introduce villagers to the benefits and effective use of stoves by providing them with a first-hand experience of using the stove.

At present, the campaign by Shell Foundation will highlight to the villagers the presence of independent improved stove manufacturers like Envirofit and Selco who have launched a range of clean burning biomass cookstoves in the country designed by teams of globally recognized scientists and engineers.

The Shell Foundation sees this awareness campaign as one of the most exciting and important developments in its Breathing Space program, which aims to achieve a significant long term reduction in IAP by designing so-called improved stoves that are more emission and fuel efficient – and by developing a sustainable way to get them in to people’s homes.

Source – http://www.indiaprwire.com/pressrelease/environmental-services/2009111937944.htm

Dar Es Salaam — The sun is setting slowly over Dar es Salaam’s Tabata Changombe neighbourhood. Ameenah and Skukulu Juma lean against the corrugated iron walls of their makeshift charcoal shop.

The earth is black. Charcoal layers every surface and crevice. Shawls over their heads, tired looks dampening their eyes, they’re waiting for customers.

“This is my only business,” says Ameenah Juma, looking sideways nervously. “My husband passed away, I have two children and I also look after my parents. It is very hard, because they all depend on my income.”

A woman comes by and fills a small sack, hands over 1,500 Tanzanian shillings (equivalent to about $1.20 dollars) and continues down the street, dodging goats and avoiding swerving mini-buses.

The World Bank estimates that one million tonnes of charcoal are consumed in Tanzania each year, roughly half of this in the capital, Dar es Salaam. Juma is part of a small business collective whose members put their money together to purchase charcoal – often illegally produced – by suppliers far outside Dar es Salaam.

The transporters are the most at risk in this market. They survive only if they can pass beneath watchful eyes of the police; if caught they risk being fined – or, more often, pay a bribe for release.

“During the time when the business was good, I used to go and collect the charcoal myself, but now because the business is difficult I stay here and buy from people who transport it here,” she said.

“We organise a truck that can carry about 80 sacks,” says Juma, “some of which we sell here, the rest we sell to other people for their businesses. After the costs of purchasing and transport, we end up with about 4,000 shillings ($3 profit) per large sack of charcoal, which is shared between the workers and their dependents.

Juma is vague about how much she earns each month. “Very little,” she says.

“It used to be a very good business, because very few people were doing it. Now the market is very competitive and many people are selling charcoal. We don’t earn much money, sometimes it’s not even enough to buy food for my family,” she said.

Demand for charcoal across sub-Saharan Africa is extremely high. Compared to wood, it burns with less smoke and is also more readily available to urban consumers.

According to the Household Energy Network (HEDON) charcoal is high-value and easy to transport and store. The fuel has twice the calorific value of wood, but it is burnt in highly wasteful stoves, which are much less efficient than gas or electric stoves.

Charcoal has long been the main fuel for cooking in households and restaurants throughout Tanzania. It is the only real option for the urban poor in Dar es Salaam. Gas is reserved for the well-off, electric stoves are few and far between, and firewood is not easily found within the city limits.

Making charcoal

Most charcoal production happens deep in the forests far from the city and out of sight, smaller production happens on individual farms closer in, where authorities rarely visit.

About an hour’s drive from Dar es Salaam, amongst tall coconut trees and pineapple plantations, where the earth is sandy and the dirt roads barely passable by car, is a thin and humble farmer by the name of Hheki.

He and his two young sons have created an earth kiln in which they are burning wood to make charcoal. Smoke wafts away in heavy clouds into the atmosphere and a strong, almost plastic smell penetrates the nostrils from underneath the palm fronds and dirt.

“This is not my only business,” says Hheki, “it is very small-scale. I also grow vegetables to help my income.

“I cut the trees just from around here by myself. I use the cashew nut trees, this one was dead,” he says, pointing to a large pit where a tree recently stood and is now smoking under the nearby mound.

A neighbour, and local farmer, Anna Hunki pitches in. “When I came here in 1988, this place was a forest,” she says flailing her arms in the air and circling her gaze around the area.

“I fear one day it will turn into a desert.”

Hheki concurs that there used to be a lot of trees in the area, but, says that when he cuts a tree he also plants a tree in its place. He goes on to describe the process of making an earth kiln by drawing diagrams in the dirt.

“First you cut the tree, then you cut it in to pieces. Then you arrange them into a pile, and into a tunnel – like this.

Then you cover it with branches and dirt, And then you burn it, for a tunnel this size, it takes 3-4 days, then I can sell it.

“People come and buy it from me (for half or less than half of the market price) because I don’t have any access to transport to sell it myself,” he says.

Environmentally, charcoal use has a severe impact, accounting for a large part of deforestation in developing countries. According to the Tanzanian Traditional Energy and Development Organisation, TaTEDO, some 300 hectares of forest are cleared each day in Tanzania, for timber, to clear space for agriculture or grazing livestock and for the production of charcoal.

One hundred million tonnes of charcoal are produced annually in Tanzania, resulting in nine million tonnes of CO2 emitted into the atmosphere.

There are other reasons for Tanzanians’ dependency on charcoal, according to Moses Mallanda, also a resident of the Tabata Changombe neighbourhood: people are fearful of electricity and gas.

“The Chinese people are importing wires for wiring the houses, which is of very poor quality,” Mallanda says, “and sometimes houses burn, so people think that gas is even more dangerous. People need to be educated first about gas and electricity then they can use it. Even myself, I can afford to use gas but I am scared of it, I don’t trust myself or my wife to use it.”

Mallanda’s wife Lucy disagrees. She says she would much prefer to use gas than charcoal, because it is much cleaner and user-friendly; it doesn’t smoke the house out or make the floors dirty.

Mallanda’s neighbour, Miriam Kipiki, also challenges the idea that people fear gas. “I’ve been using gas for two years now. I was using charcoal before,” she said. “It’s the initial cost of the stoves that is expensive, but they last for a very long time, whereas the stoves for charcoal break down every three months or so.”

Kipiki comes from a well-off family and is familiar with gas stoves, protests Mallanda. This makes it easier for her to afford a gas stove, and to use one.

Earlier Mallanda had mentioned that in Tanzania, domestic work is usually considered women’s work.But, he said, women are becoming much stronger these days: “they do what they want.”

“Perhaps you’ll have to buy a gas stove now that you know your wife wants it?” I say.

He laughs, “maybe,” then sits down on the large couch to watch the television.

“The choice of what to cook with is yours,” says Lucy Mallanda, “the government doesn’t offer any ideas or solutions, they just create ads on how bad charcoal is.”

Press reports on illegal timber exports and growing awareness of deforestation led government to impose a total ban on charcoal in 2006. A March 2009 study of charcoal use in Tanzania by the World Bank says the ban’s only impact was to deprive the government of revenue from licensing production while brisk trade carried on illegally. Prices for charcoal went up – and stayed up – as did corruption of officials.

The ban lasted only two weeks.

The goverment’s search for more effective action is complicated because responsibility falls between various ministries. Policies on better management of forests have been put in place; taxes on gas and the cylinders it’s sold in have been lifted, with limited effect.

The World Bank study’s recommendations begin with improving how government taxes on charcoal are collected. The authors call for fees to be collected as the fuel is transported, instead of attempting to license tens of thousands of small producers on-site; more of this revenue should be left at the district level, where it should be spent on reducing forest degradation through community-based management and training charcoal producers on more efficient techniques.

At the other end of the chain, more efficient stoves would reduce demand while saving poor households money; and affordable alternatives to charcoal, such as ethanol gels or briquettes pressed out waste materials like sawdust should be supported.

The failure of the ban illustrates how any policy combination will have to be thought through with care. The charcoal industry generates an estimated 650 million dollars a year, employing hundreds of thousands of people, as producers, transporters, artisans who manufacture charcoal stoves, and retailers like the Jumas.

The challenge is to find ways to preserve their livelihoods, use forest resources sustainably, and maintain supplies of affordable fuel for the poor.

Source – http://allafrica.com/stories/200911200007.html

Environ Health. 2009 Nov 18;8(1):51.

Sources of variation for indoor nitrogen dioxide in rural residences of Ethiopia.

Kumie A, Emmelin A, Wahelberg S, Berhan Y, Ali A, Mekonen E, Worku A, Karlson D.

BACKGROUND: Unprocessed biomass fuel is the primary source of indoor air pollution in developing countries. The use of biomass fuel has been linked with acute respiratory infections. This study assesses sources of variations associated with the level of indoor NO2.

Materials and Methods: This study assesses household factors affecting the level of indoor pollution by measuring nitrogen dioxide. Repeated measurements of indoor nitrogen dioxide (NO2) were made using a passive diffusive sampler. A Saltzman colorimetric method using a spectrometer calibrated at 540 nm was employed to analyze the mass of NO2 on the collection filter that was then subjected to a mass transfer equation to calculate the level of NO2 for the 24 hours of sampling time. Structured questionnaire was used to collect data on fuel use characteristics. Data entry and cleaning was done in EPI INFO version 6.04, while data was analyzed using SPSS version 15.0. Analysis of variance, multiple linear regression analysis and linear mixed model were used to isolate determining factors contributing to the variation of NO2 concentration.

RESULTS: A total of 17,215 air samples were made during the study period. Wood and crop were principal source of household energy. Biomass fuel characteristics were strongly related to indoor NO2 concentration in one-way analysis of variance. There was variation in repeated measurements of indoor NO2 over time. In a linear mixed model regression analysis, highland setting, wet season, cooking, use of fire events at least twice a day, frequency of cooked food items, and interaction between ecology and season were predictors of indoor NO2 concentration. The volume of the housing unit and the presence of kitchen showed little relevance in the level of NO2 concentration.

CONCLUSIONS: Agro-ecology, season, purpose of fire events, frequency of fire activities, frequency of cooking and physical conditions of housing are predictors of NO2 concentration. Improved kitchen conditions and ventilation are highly recommended.

By Ben Byekwaso, November 2009

DEFORESTATION is a rising problem in Uganda. It has led to very long drought seasons in central and south- western Uganda. Drought was unheard of about 15 to 20 years ago. In Uganda almost everybody uses firewood and wood charcoal, it is very scary and worrying that one day it may become a desert because of the deforestation going on everyday.

The significant part of Uganda’s population, especially those who live in villages, lack access to modern cooking fuels and technologies and breathe indoor smoke everyday. It is now scientifically consensual that women and young children are at the greatest risk, because they spend the most time near the indoor cooking fires daily.

Dumping of waste without proper treatment creates dangerous, unsanitary and unhealthy conditions in urban areas. Accumulation of waste also creates severe long term environmental problems like climate change and global warming.

It is now time that we started doing something to ensure scientific treatment and disposal of waste without causing any harm to the atmosphere. Otherwise the lives of the next generation will be affected adversely.

Where do we start to tackle this problem? Production of biogas is a bigger part of the answer.

What is biogas?
Biogas is the name given to the gas produced through the process of anaerobic digestion. Anaerobic digestion is a naturally occurring process and it is the bacterial break down of organic materials in the absence of oxygen. This process produces biogas.

The biogas produced has two main constituents, about 60% methane gas used for cooking and 40% carbon dioxide and traces of hydrogen sulphide and nitrogen. Anaerobic digestion is not new; it has existed for a long time on earth. Biogas is a universally accepted and proven technology for bio-energy generation from bio-waste.

Biogas is a form of renewable energy. It is considered a source of renewable energy because the production of biogas depends on supply of grass, food and other agricultural plants, which usually grow back each year.

Animals that eat a lot of plant materials, particularly grazing animals such as cattle, elephants, goats, horses etc, produce large amounts of biogas. The biogas is produced not by the cow or elephant, but by billions of micro-organisms living in its digestive system.

The production of biogas involves using biogas digester plants (machines) which facilitate the process of anaerobic digestion. The plants can be built on domestic level, which can enable most households to own one.

These plants treat hygienically kitchen waste and other biowaste and produce gas for cooking instead of using firewood or charcoal. It also prevents the tendency to throw the waste materials on roads and in public places.

Statistics from the Ministry of Energy (March 2009) suggest that usage of biogas digesters is virtually untapped in Uganda.

There are only about 1,000 biogas digesters in the country. This shows how much the potential of biomass technology is underutilised for the population of 30 million people.

Uganda is richly endowed with renewable energy resources and has large quantities of non-woody biomass such as agricultural waste, animal and human waste and every home produces these wastes. There is a huge potential to develop biogas technology to reduce significantly the usage of firewood and charcoal.

Biogas technology is already successful in China, South East Asia particularly India, and some parts of Latin America. Like many other technologies; Africa, especially sub-Saharan Africa still lags behind in using this technology.

Eco-friendly latrines can be built in almost every household in rural areas with a biogas producing plant attached to it, and most important of all it is affordable. That will mean no more digging up deep pit latrines. Instead of building septic tanks for the new houses in urban areas; at a cheaper cost, a biogas digester plant can be built and generate cooking gas for these households.

A family of five produce enough biowaste to produce biogas which can run a stove for two hours and above. Biogas has been used in Rwanda prisons since 2001, about six prisons are saving 50% of cooking costs by using human excreta to produce cooking gas for the prison population of about 30,000.

The biowaste produced in markets within the Kampala region have a potential of generating electricity of about 2MW plant capacity on a daily basis. It can even be bigger if you add on waste from surrounding hospitals, colleges, schools, Universities and Slaughter houses.

The Government has an obligation raise a massive awareness and promotion of the production of biogas and also give tax incentives and subsidies to those who are willing to invest in this ventures.

Source – New Vision

According to the official Web site of Virunga National Park in the Democratic Republic of the Congo (DRC), “charcoal stands as the single biggest threat to the mountain gorillas and other flora and fauna in the park.” Criminal gangs chop down trees in Virunga, which they then to burn to form charcoal; they kill any human, gorilla or other animal that gets in their way.

Locally, there are few readily available fuel alternatives to charcoal, so earlier this year a project began through the Africa Conservation Fund to bring 1,000 biomass pressing machines to the region. The machines, which not only create sustainable, alternative fuel but are providing much-needed local employment, use materials like sawdust, rice husks, coffee and tea residues, sorghum, leaves, and grass to create a burnable briquette that costs less than half the price of charcoal.

But shifting the public away from charcoal has been a challenge. “Cultural barriers run high, and people just don’t like to change the way they cook,” wrote Emmanuel de Merode, chief warden of Virunga National Park for the Congolese Wildlife Authority. “Briquettes do produce more smoke, which people hate, but they are also much cheaper. Old habits die hard, and it’s not an easy sell.”

The project currently has 500 of the planned biomass presses in use, and employs 3,000 people in the briquette-making process. But although they are producing 4,000 sacks of briquettes a month (about 130 daily), they are only selling an average of 10 sacks a day.

In order to inspire greater demand, the team at Virunga has started distributing a two-page comic strip, printed in Swahili, that illustrates the benefits of heating and cooking with biomass briquettes instead of charcoal. Other elements of their marketing campaign include billboards and leaflets as well as a reggae band that travels the countryside singing about briquettes and mountain gorillas.

Meanwhile, the team is also asking for other marketing ideas that could help popularize the use of the alternative fuel.

Source – Scientific American, Nov. 2009

Air pollutants linked to lung condition in kids

Infants exposed to outdoor air pollution even at levels that fall within regulatory limits have a higher risk of getting admitted to hospital for bronchiolitis, according to a study published in the November 2009 issue of the American Journal of Respiratory and Critical Care Medicine.

It is thought that ambient air pollution makes lungs more susceptible to bronchiolitis, which is the leading cause of morbidity in infants. Yet little is known about how exposure to air pollutants can influence the chances of developing the condition, and specifically about the risks of early-life exposure.

The team of researchers from the USA and Canada, led by Catherine Karr, evaluated the impact of several air pollutants and their sources on hospital admissions for bronchiolitis among infants in southwestern British Columbia. They looked at data for 11,675 young children who received their first hospital treatment for bronchiolitis between the second and twelfth month of life. For each patient, 10 infants without the condition were matched for month and year of birth.

Using various methods the authors estimated exposure to pollutants from traffic, industrial emissions and wood smoke, and then linked these estimates to information on where the infants resided. Levels of nitric oxide (NO), nitrogen dioxide (N02), carbon monoxide (CO), sulfur dioxide (SO2), ozone (O3) and particulate matter (PM2.5 and PM10) were tracked at air-monitoring stations within 10km of the infants” homes. Exposure to traffic fumes was assessed using land-use regression models of NO2, NO and PM, and with information on the residences’ proximity to highways.

After adjusting for variables such as gender, maternal age, smoking and breastfeeding, the authors found that a rise in exposure by a quartile unit was associated with a higher risk of bronchiolitis. The link was statistically significant for exposures — both over a lifetime and in the month before an illness episode — to NO2, NO, SO2, CO and, for the first time, wood smoke. Infants who lived within 50 metres of a major highway were 6% more likely to have the condition compared to those who lived further away.

“The findings add to our increasing understanding of infants and children as susceptible to health risks from low level, day in day out exposure to environmental contaminants,” says lead author Catherine Karr, Director of the Pediatric Environmental Health Specialty Unit at the University of Washington, USA.

Although the magnitude of the risk in this and previous studies of air pollution health effects is “modest”, say the researchers, the public health impact is significant because virtually everyone is exposed to these air pollutants at low levels. The area studied had “low to moderate” concentrations of air pollutants that, on average, did not exceed US standards or guidelines.

But the study’s findings are relevant for most parts of the world because exposure to traffic is ubiquitous and, in many countries, biomass burning for heating and cooking indoors leads to extremely high exposures to wood smoke, adds Karr. “In many rapidly developing cities, air pollution concentrations far exceed those observed in our region.”

The researchers call for further investigation of the link, pointing to limitations of their study. “The biggest difficulty with large studies like these is the ability to have perfect representation of exposure to the contaminant of interest as well as other exposures and all of the other factors that influence health, such as genetic predisposition,” explains Karr.

Reference – Karr CJ, Demers PA, Koehoorn MW, Lencar CC, Tamburic L, Brauer M. Influence of ambient air pollutant sources on clinical encounters for infant bronchiolitis. Am J Respir Crit Care Med 2009, 180:995–1001. doi: 10.1164/rccm.200901-0117OC

Source – http://www.eht-forum.org/news.html?fileId=news091106021341&from=home&id=0

To add to HEDON’s existing database of stoves (www.hedon.info/StoveImages), HEDON is in the process of updating all those available around the world. If you have designed a stove or if you are disseminating or selling a stove, please fill in the form at: www.hedon.info/StoveImages

Send the stove’s picture and technical drawing/rough drawing, if possible, (side view and top view) to: Karabi Dutta on karabi.dutta@gmail.com.
All answers will be collated over the next month.

Last submissions for the 2010 compendium accepted until 20th December 2009.