Kiera Jefferson
Household air pollution is caused by the use of inefficient and polluting fuels and technologies in and around the home. This includes the burning of solid fuels such as wood, animal dung, charcoal, agricultural waste, and kerosene in open fires or inefficient stoves. These fuels contain a range of health-damaging pollutants, including small particles that penetrate deep into the lungs and enter the bloodstream. Exposure to household air pollution can cause a range of adverse health effects, including short-term symptoms such as burning eyes, coughing, and nose and throat irritation, as well as long-term health issues such as respiratory infections, cardiovascular disease, and lung cancer. It is a leading cause of premature death, particularly in low- and middle-income countries, where access to clean fuels and technologies is limited.
| Characteristics | Values |
|---|---|
| Definition | Household air pollution is caused by the use of inefficient and polluting fuels and technologies in and around the home. |
| Polluting fuels | Wood, animal dung, charcoal, agricultural waste, kerosene, and coal |
| Clean fuels | Solar, electricity, biogas, liquefied petroleum gas (LPG), natural gas, alcohol fuels, biomass stoves |
| Health effects | Burning eyes, coughing, nose and throat irritation, headaches, dizziness, fatigue, asthma, pneumonia, cardiovascular disease, lung cancer, stroke, low birth weight, stillbirth, ear infections, upper respiratory infections, tuberculosis, cataract, nasopharyngeal and laryngeal cancers, cervical cancer |
| Deaths | Over 3 million people die prematurely each year from diseases caused by household air pollution |
| Regions | Sub-Saharan Africa, Southeast Asia, China, India, Burundi, Mali, Tanzania, Uganda |
| Population exposed | 47% of the global population or about 3.6 billion people rely on solid fuels for cooking |
| Progress | From 2010 to 2020, China reduced the percentage of its population exposed to household air pollution from 53% to 30%, while India reduced its percentage from 73% to 60%. |
| Strategies | Policies providing financial support for cleaner technologies, improved ventilation and housing design, communication campaigns for clean energy use |
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What You'll Learn
Health risks of household air pollution
Household air pollution is caused by the use of inefficient and polluting fuels and technologies in and around the home. Pollutants include small particles that can penetrate deep into the lungs and enter the bloodstream. Women and children, typically responsible for household chores such as cooking and collecting firewood, are at the greatest risk of exposure to household air pollution.
Household air pollution is a major health risk, particularly for the world's poorest. Over 3 million people die prematurely each year from diseases caused by household air pollution. Of these deaths, 32% are due to ischaemic heart disease, 23% to stroke, 19% to chronic obstructive pulmonary disease (COPD), 21% to lower respiratory infections, and 6% to lung cancer. In children under five years old, exposure to household air pollution is responsible for almost half of all pneumonia deaths.
Other health risks associated with household air pollution include low birth weight, stillbirth, asthma, ear infections, upper respiratory infections, tuberculosis, cataract, nasopharyngeal and laryngeal cancers, and cervical cancer. The fine particulate matter and other pollutants in indoor smoke can also cause inflammation in the airways and lungs, impairing immune response and reducing the oxygen-carrying capacity of the blood.
In addition to the health risks posed by exposure to indoor air pollution, the use of polluting fuels and technologies also poses safety risks. Kerosene, which is often sold in refilled soda bottles, is the leading cause of childhood poisonings. Burns and scalds from open fires or unstable stoves can also result in serious injuries and death, especially among children.
There is a large discrepancy in access to cleaner cooking alternatives between urban and rural areas. Strategies to increase the adoption of clean household energy include policies that provide financial support for cleaner technologies and fuels, improved ventilation or housing design, and communication campaigns to encourage clean energy use.
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Clean household energy solutions
Household air pollution is caused by the use of inefficient and polluting fuels and technologies in and around the home. These include solid fuels such as wood, charcoal, coal, crop waste, and dung, as well as kerosene, which are burned in open fires or inefficient stoves. The World Health Organization (WHO) has issued guidelines for indoor air quality, recommending clean fuels and technologies such as solar, electricity, biogas, liquefied petroleum gas (LPG), natural gas, alcohol fuels, and biomass stoves that meet emission targets.
Policy Action Plans
The WHO has developed the Clean Household Energy Solutions Toolkit (CHEST) to assist countries and programs in creating and implementing policy action plans for expanding clean household energy access. CHEST provides resources and tools for mapping key stakeholders, conducting situational assessments, identifying technological and policy intervention options, and setting standards. It enables policymakers to design programs that increase access to clean and safe household energy, with a focus on health benefits.
Financial Support
Providing financial support to purchase cleaner technologies and fuels can help accelerate the adoption of clean household energy solutions. This can include subsidies, loans, or grants for households to invest in cleaner burning fuels, improved stoves, and alternative lighting sources.
Improved Ventilation and Housing Design
Interventions in house construction and design can reduce the need for fuel-based lighting and heating. This includes improving ventilation, using energy-efficient building materials, and incorporating natural lighting sources. Additionally, well-ventilated dwellings can significantly reduce indoor smoke levels, protecting the health of those exposed.
Communication Campaigns
Educational and awareness campaigns can encourage the adoption of clean energy practices. Communicating the health risks associated with household air pollution and promoting the benefits of clean energy solutions can motivate households to make the transition. Campaigns can also focus on safe fuel collection practices to reduce the risk of musculoskeletal damage, injuries, and violence associated with fuel gathering.
Clean Fuel and Technology Alternatives
Promoting the use of clean fuels and technologies is crucial. This includes transitioning from solid fuels to cleaner alternatives such as solar power, electricity, biogas, liquefied petroleum gas (LPG), and natural gas. These alternatives have significantly lower emissions and reduce the health risks associated with traditional fuel sources.
By implementing these strategies and utilizing the resources provided by initiatives like CHEST, significant progress can be made in reducing household air pollution and improving the health and well-being of those affected.
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Solid fuels and inefficient stoves
Household air pollution is caused by the use of inefficient and polluting fuels and technologies in and around the home. Solid fuels, such as wood, charcoal, coal, animal dung, and crop waste, are burned for cooking, heating, and lighting in inefficient stoves or open fires. This practice is common in low- and middle-income countries, with around 2.1 billion people relying on these polluting fuels and technologies.
The combustion of solid fuels releases dangerous particulate matter, carbon monoxide, and other toxic pollutants. The resulting indoor air pollution levels can be significantly worse than the recommended air quality guidelines. Poor ventilation exacerbates the problem, with indoor smoke reaching levels of fine particles up to 100 times higher than acceptable. This is particularly detrimental to women and children, who typically spend the most time near the domestic hearth and are responsible for household chores such as cooking and collecting firewood.
The health impacts of exposure to household air pollution from solid fuels and inefficient stoves are significant. It is a leading cause of premature deaths, with an estimated 3.2 million people dying annually from illnesses attributable to this type of pollution. The health risks include pneumonia in children, especially those under five years old, and chronic obstructive pulmonary disease (COPD), lung cancer, stroke, and cardiovascular disease in adults. Exposure during pregnancy may also lead to low birth weight, stillbirth, and decreased lung function in infants.
The use of solid fuels and inefficient stoves also poses safety risks, such as burns and scalds from open fires or unstable stoves. Additionally, the collection of solid fuels can increase the risk of musculoskeletal damage from carrying heavy loads and the risk of injury or violence when alone in insecure areas.
To address the issues associated with solid fuels and inefficient stoves, it is essential to promote the adoption of clean fuels and improved stoves. This includes encouraging the use of solar, electricity, biogas, liquefied petroleum gas (LPG), natural gas, alcohol fuels, and biomass stoves that meet emission targets. Implementing policies that provide financial support for cleaner technologies and fuels, improving ventilation and housing design, and conducting communication campaigns to raise awareness about the importance of clean energy use can all contribute to reducing the negative impacts of solid fuels and inefficient stoves on health and the environment.
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Indoor air quality guidelines
Indoor air quality (IAQ) guidelines are essential to ensure human health and well-being in homes, schools, and offices. Poor indoor air quality can have adverse health effects, with household air pollution being a leading cause of disability-adjusted life years globally, and the primary cause in Southeast Asia. Here are some detailed guidelines to improve indoor air quality:
Identify Sources of Pollution
The first step is to identify the sources of indoor air pollution. These can vary from country to country and include building materials, gas appliances, cleaning products, personal care products, furniture, and tobacco smoking. Other sources may include mosquito repellents, pesticides, incense, artificial fragrances, and cooking fuels such as wood, charcoal, or crop waste.
Improve Ventilation
Proper ventilation is crucial for maintaining good indoor air quality. In poorly ventilated homes, indoor smoke levels can be dangerously high. Ensure that your home has adequate ventilation systems, such as exhaust fans or open windows, especially in the kitchen and areas where pollutants are generated.
Use Clean Fuels and Technologies
Transitioning to clean fuels and technologies is essential to reduce household air pollution. The World Health Organization (WHO) recommends the use of solar energy, electricity, biogas, liquefied petroleum gas (LPG), natural gas, alcohol fuels, and biomass stoves that meet their emission targets. These alternatives are significantly less polluting and have a lower impact on human health.
Limit the Use of Open Fires and Inefficient Stoves
Open fires and inefficient stoves, commonly used in many parts of the world, contribute significantly to indoor air pollution. The burning of polluting fuels such as wood, animal dung, charcoal, or kerosene in these setups releases harmful pollutants. It is advisable to switch to cleaner cooking alternatives, such as improved cookstoves designed for better combustion and reduced emissions.
Promote Energy Efficiency
While improving indoor air quality, it is also essential to consider energy efficiency and climate change goals. Balancing good IAQ with energy conservation can be achieved through scientifically established limit values for exposures. For example, HVAC systems can provide thermal comfort, but they may lead to higher energy consumption. Therefore, it is crucial to follow international and national guidelines, such as the Indoor Environmental Quality (IEQ) guidelines, to optimize both energy efficiency and indoor air quality.
Regular Cleaning and Maintenance
Regular cleaning and maintenance of indoor spaces can help reduce the presence of pollutants. This includes proper waste management, cleaning products, and pest control methods that do not introduce additional harmful chemicals into the indoor environment.
By following these guidelines and staying informed about regional and national regulations, individuals can play a significant role in improving indoor air quality, thereby reducing the health risks associated with household air pollution.
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Global and regional trends
Household air pollution (HAP) is a leading global risk factor that contributes significantly to the burden of disease. Despite a substantial reduction in the use of solid fuels for cooking worldwide, exposure to HAP remains a significant concern. In 2021, about 2.67 billion people, or approximately one-third of the global population, were exposed to HAP. The rate of HAP-attributable DALYs was higher for males than for females, and approximately one-third of the HAP-attributable burden was mediated through short gestation and low birth weight.
HAP exposure is significantly higher in poorer countries than in wealthier ones. People in less-developed countries often have limited or no access to cleaner energy sources and rely on solid fuels that are subsidized or locally available. Many of these countries lack the infrastructure to provide clean energy solutions for cooking and heating. The 10 countries with the highest proportion of households cooking with solid fuels include several African nations, such as the Central African Republic, South Sudan, Rwanda, Burundi, and Niger.
Regional trends indicate that HAP exposure has decreased in parts of Asia, particularly in China and India, due to aggressive campaigns promoting cleaner fuels. However, HAP exposure remains high in much of Africa. Population growth in regions like sub-Saharan Africa has counteracted the positive impact of reduced solid fuel usage, resulting in an overall increase in HAP exposure.
Fuel-specific modelling revealed that wood was the most prevalent solid fuel worldwide, with 24% of the global population exposed in 2021. Coal was the second most prevalent fuel, with 5.4% of the population exposed, mainly in sub-Saharan Africa, Southeast Asia, East Asia, and Oceania.
The Global Burden of Disease Study provides comprehensive global health estimates, examining worldwide, national, and regional trends for mortality and morbidity from major diseases, injuries, and risk factors. It offers valuable insights into the health challenges posed by HAP and guides health policymakers and practitioners in developing targeted interventions.
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Frequently asked questions
Household air pollution is caused by the use of inefficient and polluting fuels and technologies in and around the home. This includes the burning of polluting fuels such as wood, animal dung, charcoal, agricultural waste, and kerosene in open fires or inefficient stoves.
Exposure to household air pollution can cause a range of adverse health effects, including short-term symptoms such as burning eyes, coughing, nose and throat irritation, headaches, dizziness, and fatigue. Long-term exposure has been linked to more severe health issues such as respiratory diseases, heart disease, stroke, and cancer.
Household air pollution affects people of all ages, from infants to the elderly. However, women and children bear the greatest health burden as they typically spend the most time near the domestic hearth and are often responsible for household chores involving polluting fuels and technologies.
According to estimates, nearly half of the world's population, or about 3.6 billion people, are exposed to household air pollution. It is more prevalent in poorer countries and rural areas, where access to clean fuels and technologies is limited.
Reducing household air pollution involves transitioning to cleaner fuels and technologies, such as solar, electricity, biogas, liquefied petroleum gas (LPG), and natural gas. Improving ventilation in homes and implementing policies that promote clean energy use and provide financial support for accessing cleaner technologies can also help minimize household air pollution.
