Cook stove

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A biomass cook stove is heated by burning wood, charcoal, animal dung or crop residue. Cook stoves are commonly used for cooking and heating food in rural households. Nearly half of the world's population, approximately 3 billion people, use solid fuels such as coal, wood, animal dung, and crop residues for their domestic energy needs. Among those who use indoor cooking stoves, the poorest families living in rural areas most frequently use solid fuels, where it continues to be relied on by up to 90% of households.[1]

Households in developing countries consume significantly less energy than those in developed countries; however, over 50% of the energy is for cooking food. The average rural family spends 20% or more of its income purchasing wood or charcoal for cooking. The urban poor also frequently spend a significant portion of their income on the purchase of wood or charcoal. Deforestation and erosion often result from harvesting wood for cooking fuel. The main goal of most improved cooking stoves is to reduce the pressure placed on local forests by reducing the amount of wood the stoves consume, and to reduce the negative health impacts associated with exposure to toxic smoke from traditional stoves.[2]

## Contents

* 1 Air pollution
* 2 Health impacts on women and children
* 3 Three-stone cooking fire
* 4 Improved stoves and other measures
* 4.1 Brick and mortar stove
* 4.2 Lorena adobe stove
* 4.3 Kenya Ceramic Jiko
* 4.4 Sanjha Chulha/Earth Stove/Surya Stove
* 4.5 Project Surya
* 4.6 Prefab stoves
* 4.7 Baker stoves
* 4.8 Turbo stoves
* 4.9 BioLite stoves
* 4.10 Solar stoves
* 4.11 Bio ethanol fueled cook stoves
* 5 Advanced biomass cookstoves
* 6 Classification of cook stoves
* 7 Barriers to cookstove adoption
* 7.1 Behavioral attitudes and preferences in cooking practices
* 8 See also
* 9 References
* 9.1 Book sources

## Air pollution

Often used in open fires or poorly ventilated stoves, solid fuel burning is a significant source of indoor air pollution. Solid fuel smoke contains thousands of substances, many of which are hazardous to human health. The most well understood of these substances are carbon monoxide (CO); small particulate matter; nitrous oxide; sulfur oxides; a range of volatile organic compounds, including formaldehyde, benzene and 1,3-butadiene; and polycyclic aromatic compounds, such as benzo-a-pyrene, which are thought to have both short and long term health consequences.[1]

Cooking over a traditional open fire or mud stove can cause increased health problems brought on from the smoke, particularly lung and eye ailments, but also birth defects. The health problems associated with cooking using biomass in traditional stoves affect women and children most strongly, as they spend the most time near the domestic hearth. Replacing the traditional 3-rock cook stove or mud stove with an improved one and venting the smoke out of the house through a chimney can significantly improve a family's health. There are many well-documented adverse health effects of exposure to pollutants from indoor cookstoves, including acute respiratory infections (ARIs), chronic obstructive pulmonary disease (COPD), pulmonary tuberculosis (TB), cataracts, low birth weight (LBW), increased perinatal and infant mortality, nasopharyngeal and laryngeal cancer, and lung cancer. It is estimated that 4% to 5% of the global mortality and disability adjusted life-years (DALYs) are from ARIs, COPD, TB, asthma, lung cancer, ischemic heart disease, and blindness attributed to solid fuel combustion when cooking in developing countries.

Behavioral change interventions, in reducing childhood household exposures, have the potential to reduce household air pollution exposure by 20 to 98%. Indoor Air Pollution (IAP)exposure can be greatly reduced by cooking outdoors, reducing time spent in the cooking area, keeping the kitchen door open while cooking, avoid leaning over the fire while attending to the meal preparation, staying away while carrying children when cooking and keeping the children away from the cooking area. Opportunities to educate communities on reducing household indoor air pollution exposure include festival collaborations, religious meetings, and medical outreach clinics. Community health workers represent a significant resource for educating communities to help raise awareness regarding reducing the effects of indoor air pollution.[3]

## Health impacts on women and children

Exposure to indoor air pollution (IAP) from the burning of fossil fuels, wood, animal dung and crop residues for cooking, heating and lighting accounts for a significant portion of the global burden of death and disease and disproportionately affects women and children in developing regions.[4] In developing regions, women are more often responsible for childcare and household duties such as cooking. This places women and children at the greatest exposure of IAP from burning solid fuel during cooking and heating of the home.[2]

Examples of specific health impact from the use of indoor cooking units includes new cases of asthma in children. The use of indoor cooking units has been shown to increase the risk of developing asthma by 2 to 3.5 times when controlling for all other factors.  These and other studies show that in addition to the irritants being inhaled, exposure to the indoor cooking units actually changes children's pulmonary response to the irritants with a more reactive and inflammatory response that may last well into adulthood. Given that indoor cooking units are in use in the most rural and remote communities, the development of asthma by a child can create a significant burden in a family and pose a significant risk for death if children are subject to an asthma attack and are without access to rescue inhaler or emergency medical care[5]

Built-in wood stove cooking food

## Three-stone cooking fire

cooking tortillas (flatbread) on a wood-fired 3-stone stove

The traditional method of cooking is on a three-stone cooking fire or on a mud stove. The three-stone fire is the cheapest stove to produce, requiring only three suitable stones of the same height on which a cooking pot can be balanced over a fire. However, this cooking method also has problems:

* Smoke is vented into the home, instead of outdoors, causing health problems. According to the World Health Organization, "4.3 million people a year die prematurely from illness attributable to the household air pollution caused by the inefficient use of solid fuels (2012 data)."[6]
* Fuel is wasted, as heat is allowed to escape into the open air. This requires the user to gather more fuel and may result in increased deforestation if wood is used for fuel.
* Only one cooking pot can be used at a time.
* The use of an open fire creates a risk of burns and scalds.[7] Particularly when the stove is used indoors, cramped conditions make adults and particularly children susceptible to falling or stepping into the fire and receiving burns. Additionally, accidental spills of boiling water may result in scalding, and blowing on the fire to supply oxygen may discharge burning embers and cause eye injuries.

## Improved stoves and other measures

The World Health Organization has documented the significant number of deaths caused by smoke from home fires.[8] The negative impacts can be reduced by using improved cook stoves, improved fuels (e.g. biogas instead of dung), changes to the environment (e.g. use of a chimney), and changes to user behavior (e.g. drying fuel wood before use, using a lid during cooking)."[6] Improved stoves are more efficient, meaning that the stove's users spend less time gathering wood or other fuels, suffer less emphysema and other lung diseases prevalent in smoke-filled homes, while reducing deforestation and air pollution. However, a closed stove may result in production of more soot and ultra-fine particles than an open fire would.[9]

For instance, an improvement of the energy efficiency from 25% for the traditional Lao stove (wood and charcoal fired) to 29% efficiency for an improved Lao stove, results in 21% less wood fuel being needed, and saves 182,000 ton CO2eq emissions, as reported in a GHG-compensation project.[10] The traditional Lao stove needs an average of 385 kilograms of charcoal and 450 kilograms of wood per year as fuel. For making a kilogram of charcoal about seven kilograms of wood is needed. The report also indicates that in Cambodia 369,000 tons of non-renewable biomass wood fuel is consumed yearly for charcoal production for these stoves, destroying 45 km² of deciduous forests. 4% of the forest regrows.

Some designs also make the stove safer, preventing burns that often occur when children stumble into open fires. Some of the new stove designs are as follows:

### Brick and mortar stove

A variety of new brick and mortar stoves have emerged. Most of the new designs incorporate a combustion chamber found in a Rocket stove. By confining combustion to an insulated and enclosed area, the stoves increase the core temperature and thereby achieve more complete combustion. This allows a smaller amount of fuel to burn hotter, while producing less ash and smoke.[11] The Justa Stove is a simple biomass stove built around an insulated, elbow-shaped combustion chamber which provides more intense heat and cleaner combustion than an open fire, meaning that it consumes less fuel than a three-stone stove.

Dos por Tres Stove

An improved Justa Stove jointly developed by the non-profit Proyecto Mirador and the Aprovecho Research Center called the "Dos por Tres" is being disseminated in Honduras with more than 20,000 stoves installed as of 2011. The Dos por Tres has been registered as Project 690 and certified by the Gold Standard Foundation to reduce greenhouse gas emissions by 2.7 tons per year. All Proyecto Mirador documentation related to proof of these reductions can be viewed on the Gold Standard Project registry.[12]

The Justa Stove[13] has been deployed in Honduras by Trees, Water & People and ADESHA, for which they jointly won an Ashden Award in 2005.[14] The Eco Stove and the Patsari stove share common benefits with the Justa Stove, and are also used in Central America. Their proponents claim that these stoves use approximately 1/3 of the fuel required by traditional three stone stoves, lessening the daily labor devoted to gathering wood and also preventing deforestation. At the same time, it employs a stove pipe flue to vent fumes through the roof.[15] This almost eliminates cooking smoke within the home, preventing respiratory problems for the users. Various groups have run programs to provide such stoves, or encourage production of stove making facilities, including certain Rotary Clubs; Trees, Water and People;[16] and organizations aimed at preserving wildlife by preventing deforestation.

### Lorena adobe stove

A predecessor to the Justa/Eco/Patsari Stoves was the Lorena adobe Stove. It was designed as a simple-to-build cook stove for use in Central America, that could be manufactured locally of materials. The name of Lorena Stove comes from the combination of the two Spanish words lodo and arena (meaning mud and sand) as the stoves were a combination[clarification needed] of the two. The Lorena Stove is an enclosed stove of rammed earth construction, with a chimney built onto it.[17]

The Lorena Stove was designed with the mistaken belief that rammed earth would act as insulation; there was a basic misunderstanding of the difference between mass and insulation. Good insulation resists the passage of heat; thermal mass does the opposite, it absorbs heat. Testing has shown that the rammed earth used in the Lorena stove absorbs heat that should be directed toward cooking.

However, this "waste" heat radiates into the structure, providing more efficient heating than an open fire (a disadvantage in hot weather). A Lorena stove can also be used to dry clothes as its mass slowly cools off after the fire dies.

The designers, Aprovecho, now state: "The Lorena has been tested over the years by many researchers and has generally been found to use more firewood than an indoor open fire. The stove has other attributes. Its chimney takes smoke out of the kitchen and it is well liked. It is pretty and a nice addition to the house. It is low cost and can be repaired and even built by the home owner. But, it is not a fuel saving or low emission stove". In later designs, the rammed earth has been replaced with thermal insulation, such as pumice or ash.

### Kenya Ceramic Jiko

From the beginning of the appropriate technology movement, one of the principal goals has been to create an affordable stove that was more efficient than the universally used three stone cooking fire. The Kenya Ceramic Jiko is one of the improved stoves.

Charcoal is the standard cooking fuel in East Africa. Traditionally it was burned in a metal stove or "Jiko" as stoves are called in the Swahili language. The KCJ is the traditional Jiko with a ceramic liner. The initial model has a distinctive shape, differing from the traditional cylindrical jiko, with the top and bottom the same diameter, tapering at about 30 degrees to a waist.

### Sanjha Chulha/Earth Stove/Surya Stove

handmade earth stove

Since 1999, an engineering company named Nishant Bioenergy (P) Limited in North India is conceiving, designing, fabricating and selling patent pending biomass briquette and pellet fueled cook stoves. These are useful for commercial cooking and are designed to burn biomass pellet and briquette. Biomass briquettes can be made from any farm or forest residues with or without binders and pellets are made with or without the addition of binder.

The company has won national and international recognition for their efforts, including the Ashden Award in 2005,[18] PCRA Award-2001, and UN promising practices-2006.

Nishant Bioenergy developed its first stove in 1999 and named Sanjha Chulha (community-cooking stove) is an "Institutional Cook Stove" for use with multiple cooking pot and hot water tank as combined cooking. The stove name is derived from a village tradition where women would cook all their chappatis / rotis (Indian bread) on a "Sanjha Chulha", which was a communal earthen cook stove used by everyone. The stove was designed by Ramesh K. Nibhoria who also designed the Earth Stove for cooking and frying use with a single pot. Earth Stove has two model, one is fixed pellet feed and second one with automated pellet feeding system. Earth Stove with automated pellet feeding system is very innovative and has controls on heat intensity from zero to full like LPG. New design is applied for patents and also being registered under copy write acts.

The Surya Stove by Nishant Bioenergy runs on powdered biomass such as saw dust or any other biomass that has a moisture content level of 15% . The stove has an automated fuel feed system (duly linked with temperature controller) and ash cleansing system. It has a temperature controller to pre-set the temperature of the cooking/frying medium. It is especially designed for the frying needs of the ready-to-eat food industry as well as for controlled hot air requirement.

### Project Surya

Project Surya, by Scripps Institute of Oceanography at UCSD, field tested improved cook stoves and modifications during its pilot phase which is now complete and the results have been posted online.[19] Project Surya has also launched the Carbon Credit Pilot Project (C2P2) to explore if rewarding women directly with funds from carbon markets, for using improved stoves, will significantly enhance adoption of the field tested stoves.

### Prefab stoves

The Ecocina stove was designed by StoveTeam International and is manufactured at a central location from cement, pumice, and ceramic tiles. It resembles a large flower pot, with a steel cooking surface which can also receive a pot.[20] It was created by a volunteer worker who noticed the high number of respiratory illnesses and burns on patients in Guatemala. It is actively produced in countries such as Guatemala, El Salvador, Honduras, Nicaragua and Mexico. Unlike its brick and mortar counterparts, the Ecocina stoves have no flue and are manufactured in a backyard factory. They are then placed in a home on top of a table or similar raised surface. As with its brick and mortar counterpart, the Ecocina stove employs a rocket stove combustion chamber and promises reduction in the consumption of firewood and in the amount of fumes emitted into the home. It also remains cool to the touch, preventing burns.

### Baker stoves

The Baker cook stove was developed by Top Third Ventures and designed by Claesson Koivisto Rune. It is designed to emphasize aesthetic appeal, usability, and cultural conformity. Rural households in Kenya are its target consumer group. The Baker cook stove is made up of metal components. Thermal insulation and a forced air flow mechanism result in a higher combustion temperature and safer and cleaner cooking compared to the traditional three-stone cooking fire.[21]

### Turbo stoves

Some new metal stoves employ turbo-charging features such that air pressed into the stove or swirled, will then significantly increase the efficiency of combustion.

The Lucia Stove developed by World Stove[22] employs swirling air patterns to change combustion and has been economically produced. It is marketed by World Stove as one part of a larger environmental solution because it captures carbon and thereby reduces the amount of carbon in the atmosphere from cooking. It produces biochar that is then recycled back to the soil.[20]

The Turbococina Stove was developed in El Salvador by René M. N. Suarez;[23] the name is derived from the term "Turbocombustión" which is a new combustion method in which, during combustion, temperatures as low as possible are maintained to inhibit the formation of pollutants like NOx; an alternative is to reduce the concentration of oxygen below the stoichiometric requirement. The Turbococina promised positive results by employing higher pressures to lower combustion temperatures, but its high cost of production (stainless steel) and its use of electricity have prevented it from going into production. At present, it does not appear to be economically viable.

### BioLite stoves

The BioLite CampStove

The BioLite HomeStove was made to replace open cooking fires. Its design converts the heat into usable electricity to power a fan, which reduces fuel needs by 50%, toxic smoke by about 95%, and black carbon emissions by 91%. The amount of CO2 saved per year by one stove is equivalent to the amount saved by buying a hybrid car.[24] The effects of deforestation are lessened and time is regained by people spending less hours gathering wood for open fires. The remaining off-grid energy that does not power the fan can then be used to charge portable devices through a USB port, such as cell phones and LED lights.[25][26]

### Solar stoves

Solar stove used for cooking dishes[27]

Simple solar stoves use the following basic principles:

* Concentrating sunlight: A reflective mirror of polished glass, metal or metallised film concentrates light and heat from the sun on a small cooking area, making the energy more concentrated and increasing its heating power.
* Converting light to heat: A black or low reflectivity surface on a food container or the inside of a solar cooker improves the effectiveness of turning light into heat. Light absorption converts the sun's visible light into heat, substantially improving the effectiveness of the cooker.
* Trapping heat: Convection can be reduced by isolating the air inside the cooker from the air outside the cooker. A plastic bag or tightly sealed glass cover traps the hot air inside. This makes it possible to reach temperatures on cold and windy days similar to those possible on hot days.

### Bio ethanol fueled cook stoves

Clean energy bio-ethanol cooking fuel in Kenya has been pioneered by International Research & Development Africa Ltd with a BIOMOTO Cook stove. Bio-ethanol fuel is manufactured from food crop stover and post harvest, contaminated and damaged starch crops purchased from bottom of pyramid farmers.

Another initiative is Project Gaia. Alcohol fuels, such as ethanol, burn quickly, cleanly and are renewable. Project Gaia works with the CleanCook, a clean-burning stove that use absorption technology to burn the ethanol.

## Advanced biomass cookstoves

There are two primary types of advanced biomass stoves[28] that can achieve high levels of performance;[29] forced air stoves and gasifier stoves, both of which can run on processed or raw biomass.

* Forced air stoves have a fan powered either by a battery, an external source of electricity, or a thermoelectric generator. This fan blows high velocity, low volume jets of air into the combustion chamber, which when optimized results in more complete combustion of the fuel.
* Gasifier stoves force the gases and smoke that result from incomplete combustion of fuels such as biomass back into the cookstove's flame, where the heat of the flame then continues to combust the particles in the smoke until almost complete combustion has occurred, reducing emissions. Typical gasifier stoves are known as Top Lit Updraft (TLUD) stoves because some fuel is lit on top of the stove, forcing combustible products to pass through the flame front before being emitted into the air.

## Classification of cook stoves

Classification of cook stoves[30][31]

1\. Three-stone fire
2\. Early "ICS" "Improved Cook Stoves" to 1990s (clay/ceramic/buckets)
3\. Fuel-controlled stoves (mainly Rocket stoves)

a. Simple (portable) b. Stationary (w/ chimney) c. Forced-air (FA)
4\. Semi-gasifiers (mainly China and Vesto) w/ some air control
5\. Gasifiers ("micro-" for cooking), some with FA (Fan Assistance)

a. Top-lit updraft (known as TLUDs) w/ migrating pyrolytic zone (batch)
b. Updrafts and downdrafts w/ stationary gasification zones (continuous)
c. Other drafts, including cross and opposite/opposing drafts
6\. "Fan-jet" with very strong air currents into the fuel (3 known examples):

a. Philips-FA
b. Lucia-FA
c. Turbococina
7\. Non-biomass. Stoves not using raw dry biomass fuels:

Charcoal; alcohol; refined fossils; coal; biogas; electric; solar.

Multi-mode capable stoves can be used only in one way at any one time.

## Barriers to cookstove adoption

There are currently more than 160 operating cookstove implementation programs in the world. A few thousand of the cookstove implementation program distribute stoves in specific areas. This is due to high cost of alternative stoves, cookstove malfunction, and the lack of understanding as well as the importance of gender roles and discussing the adoption of alternative cookstove technology. In failing to include women in the household decision-making process, as they are predominantly responsible for childcare and meal preparation, it can lead to a decrease in adoption of improved cookstoves.

The Global Alliance for Clean Cookstoves is an organization seeks to facilitate the disbursement of clean cooking solutions and advocate for the use of clean indoor fuels for cook stoves. This organization plans to foster the adoption of clean cookstoves for 100 million households by 2020. As of 2014, the alliance has distributed 28 million clean and efficient cookstoves

Research and implementation efforts are frequently pursued with insufficient coordination with supporting organizations, which, in many cases has led to widespread implementation of so called "improved" stoves that have sometimes failed to deliver on the promise of reducing IAP. Cookstove implementation efforts have often achieved mixed results because of the combined technical and social complexities related to design of alternative stoves and personal and cultural preferences of targeted communities of improvement. Substantial variations in emissions and fuel consumption have been observed across ranges of cookstove designs and between laboratory and field test conditions. At present, a standard testing mechanism does not exist to establish the true impact of alternative cookstove designs as well as descriptive language for exposure. Stove testing studies is not always consistent depending largely on the discipline of investigators and their scientific specialization.Health assessments while increasing in frequency and focus, remain too limited to draw many connections to cookstove interventions and significant reductions in exposures to IAP and associated health risks.[32][2]

### Behavioral attitudes and preferences in cooking practices

There is not a one-size-fits-all method when it comes to cookstoves among different cultures which traditionally have different methods of construction when it comes to stoves, depending on what materials naturally exist around them. In Peru, stoves are constructed from "two or three mud- and clay-based walls surrounding a fire pit". Whereas in Nepal, stoves are constructed from "rice husks and clay". Even though clean cookstoves may help decrease indoor air pollution, traditional methods of cooking often continue to be used because of cultural tradition, the rate of cooking and as well as the preservation of unique flavors. In large families, where large quantities of food must be cooked, some researchers have observed both types of stoves being used at the same(the traditional stove and the clean cookstove). If a new clean cookstove is introduced into a culture, maintenance and repair techniques also must be addressed.[33]

## See also

* BioLite
* Hobo stove
* Envirofit
* Indoor air pollution in developing nations
* List of stoves
* Lo Trau
* Multifuel stove
* Portable stove
* Rocket stove
* Shichirin
* Sigri (stove)
* Sustainable energy

## References

1. ↑ 1.0 1.1 Peabody, J. W., Riddell, T. J., Smith, K. R., Liu, Y., Zhao, Y., Gong, J., ... & Sinton, J. E. (2005). Indoor air pollution in rural China: cooking fuels, stoves, and health status. Archives of environmental & occupational health, 60(2), 86-95.
2. ↑ 2.0 2.1 2.2 Gall, E. T., Carter, E. M., Matt Earnest, C., & Stephens, B. (2013). Indoor air pollution in developing countries: research and implementation needs for improvements in global public health. American journal of public health, 103(4), e67-e72.
3. ↑ Amegah, A. K., & Jaakkola, J. J. (2016). Household air pollution and the sustainable development goals. Bulletin of the World Health Organization, 94(3), 215.
4. ↑ "Improved Clean Cookstoves" (in en). 2020-02-07. https://drawdown.org/solutions/improved-clean-cookstoves.
5. ↑ Schei, M. A., Hessen, J. O., Smith, K. R., Bruce, N., McCracken, J., & Lopez, V. (2004). Childhood asthma and indoor woodsmoke from cooking in Guatemala. Journal of Exposure Science and Environmental Epidemiology, 14, S110-S117.
6. ↑ 6.0 6.1 Indoor air pollution and health \- World Health Organization fact sheet.
7. ↑ "Health Benefits". http://www.onilstove.com/benefits.htm.
8. ↑ Indoor air risks; World Health Organization
9. ↑ Umair Irfan (April 5, 2013). "Study finds improved cookstoves solve one emissions problem, but create another". ClimateWire E & E Publishing. http://www.eenews.net/public/climatewire/2013/04/05/1.
10. ↑ "Fuel wood saving with improved cookstoves in Cambodia". http://www.climatecare.org/media/documents/pdf/Verification_0140A_Cambodia_070607.pdf.
11. ↑ "stovetec.net". http://www.stovetec.net/us/images/stories/pdfs/DesignPrinciplesForWoodBurningCookstoves.pdf.
12. ↑ "Archived copy". https://gs1.apx.com/myModule/rpt/myrpt.asp?r=111.
13. ↑ Ashden (25 February 2008). "TWP / AHDESA, Honduras, Fuel-efficient stoves". YouTube. https://www.youtube.com/watch?v=dLlcJWXCHpQ.
14. ↑ "Justa stove wins Ashden Award". http://www.ashdenawards.org/winners/trees.
15. ↑ "green-trust.org". http://www.green-trust.org/freebooks/justastoveplans.pdf.
16. ↑ Trees, Water and People
17. ↑ Household stoves construction manual; bioenergylists.org
18. ↑ "Ashden Award for Nishant Bioenergy". http://www.ashdenawards.org/winners/nishant.
19. ↑ Aprovecho Research Center Test-Results-Cookstove-Performance.pdf
20. ↑ 20.0 20.1 "YouTube". https://www.youtube.com/watch?v=STt1I8gRkp0.
21. ↑ "JAM With Chrome Lets You Create Digital Tunes WIth Friends". 8 November 2012. http://www.fastcoexist.com/1681925/a-simple-elegant-stove-to-make-cooking-safer-in-africa.
22. ↑ https://biochar-international.org/worldstove/
23. ↑ René M. N. Suarez, US Patent 6651645
24. ↑ "BioLite Home Stove". Design To Improve Life. http://designtoimprovelife.dk/index.php?option=com_content_custom&view=article&id=550:finalist2011&catid=32:finalists-2011&Itemid=302&Itemid=302.
25. ↑ "MICROGRID ENERGY RULES THE SUSTAINABLE BRANDS INNOVATION OPEN". Fast Company. 11 June 2010. http://www.fastcompany.com/1659001/microgrid-energy-rules-sustainable-brands-innovation-open.
26. ↑ "OWPG Derryck Draper Award goes to BioLite Campstove". OWPG. 18 October 2012. http://www.owpg.org.uk/2012/10/owpg-derryck-draper-award-goes-to-biolite-campstove/.
27. ↑ Solar Cooking Atlas Website about solar stoves and solar cookers
28. ↑ The Global Alliance For Clean Cookstoves - Cookstove technology
29. ↑ "Improved Clean Cookstoves" (in en). 2020-02-07. https://drawdown.org/solutions/improved-clean-cookstoves.
30. ↑ Paul S. Anderson
31. ↑ Paul S. Anderson, 2011.Classification.pdf , PDF, Vrac.iastate.edu
32. ↑ "Research and Evaluation". Global Alliance for Clean Cook Stoves. http://cleancookstoves.org/research-and-evaluation/.
33. ↑ Rhodes, Evelyn L.; Dreibelbis, Robert; Klasen, Elizabeth; Naithani, Neha; Baliddawa, Joyce; Menya, Diana; Khatry, Subarna; Levy, Stephanie et al. (October 2014). "Behavioral Attitudes and Preferences in Cooking Practices with Traditional Open-Fire Stoves in Peru, Nepal, and Kenya: Implications for Improved Cookstove Interventions". International Journal of Environmental Research and Public Health 11 (10): 10310–10326. doi:10.3390/ijerph111010310. ISSN 1661-7827. PMID 25286166.

### Book sources

* World Health Organization (2016). Burning opportunity : clean household energy for health, sustainable development, and wellbeing of women and children. Geneva, Switzerland. https://www.who.int/airpollution/publications/burning-opportunities/en/.

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