Meghan Hodges
Household air pollution is a serious issue that affects billions of people worldwide. It is caused by a range of pollutants, including inefficient and polluting fuels, such as wood, coal, kerosene, and dung, which are burned for cooking, heating, and lighting. Other sources of indoor air pollution include tobacco smoke, building materials, cleaning chemicals, incense, mosquito repellents, and outdoor air pollution that enters the home. These pollutants can have severe health effects, including respiratory issues, heart disease, asthma, and various types of cancers. Poor ventilation and high humidity can also increase indoor pollutant levels. As a result, household air pollution is a leading cause of premature deaths and disability-adjusted life years globally, with women and children bearing the brunt of the health burden.
| Characteristics | Values |
|---|---|
| Pollutants | Kerosene, biomass (wood, animal dung, crop waste), coal, carbon monoxide, natural gas, methane, propane, butane, tobacco smoke, incense, mosquito repellents, pesticides, chemicals, artificial fragrances, mould, dust mites, bacteria, viruses |
| Health Effects | Irritation of eyes, nose and throat, headaches, dizziness, fatigue, asthma, respiratory diseases, heart disease, lung cancer, stroke, ischaemic heart disease, chronic obstructive pulmonary disease (COPD), other cancers |
| Causes | Open fires, inefficient stoves, unvented or malfunctioning appliances, cleaning, redecorating, smoking, construction materials, fuel-burning appliances, excessive moisture, poor ventilation |
| Prevention | Use of clean fuels and technologies, improved ventilation and housing design, communication campaigns to encourage clean energy use |
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What You'll Learn
Pollutants from cooking fuels and stoves
Cooking fuels and stoves are a major source of household air pollution, which has severe health impacts. Around 2.1 billion people worldwide rely on solid fuels such as wood, charcoal, coal, crop waste, and dung, as well as kerosene, for cooking. These fuels are often burned in open fires or inefficient stoves, generating harmful pollutants.
The World Health Organization (WHO) has issued guidelines for indoor air quality, recommending against the use of unprocessed coal and kerosene. Incomplete combustion of these solid fuels and kerosene releases pollutants that can cause serious health issues, including non-communicable diseases such as stroke, ischaemic heart disease, chronic obstructive pulmonary disease (COPD), and lung cancer. Exposure to indoor smoke and toxic fumes from these polluting fuels is a significant concern, especially for women and children, who are typically responsible for cooking and collecting firewood.
Gas stoves, commonly used as an alternative to solid fuels, have also been found to emit unsafe levels of nitrogen dioxide (NO2), a pollutant linked to childhood asthma and decreased lung development in children. Studies have shown that pollutant concentrations from gas stove use can spread throughout the home, affecting not just those in the kitchen but the whole family.
To address the issue of household air pollution from cooking fuels and stoves, the adoption of clean fuels and technologies is essential. This includes the use of solar, electricity, biogas, liquefied petroleum gas (LPG), natural gas, alcohol fuels, and improved biomass stoves that meet emission targets. Financial support, improved ventilation, and communication campaigns are some strategies to promote the transition to cleaner cooking alternatives.
Additionally, advanced cooking technologies, such as electric induction stoves, offer increased efficiency, safety, and reduced pollution exposure. These stoves are gaining popularity in Asia, with sales booming and prices becoming more accessible. However, access to clean fuels and technologies remains a challenge, especially in low- and middle-income countries, with an estimated 1.8 billion people projected to lack access by 2030.
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Poor ventilation
Ventilation is essential to maintaining good air quality as it helps to remove pollutants from the home and dilute emissions from indoor sources. Indoor air pollutants can come from a variety of sources, including cooking with solid fuels such as wood, charcoal, and coal, which can generate harmful household air pollution. Other sources include tobacco smoking, building materials, cleaning chemicals, incense, mosquito repellents, and even outdoor air pollution that enters the home.
The health effects of indoor air pollution from poor ventilation can vary from person to person and may depend on age, pre-existing medical conditions, and individual sensitivity. Some immediate symptoms of exposure to indoor air pollutants include eye, nose, and throat irritation, headaches, dizziness, and fatigue. These symptoms are usually short-term and treatable, and may be similar to those of a common cold, making it difficult to identify the cause.
In some cases, the effects of poor ventilation may not be noticeable right away. Prolonged exposure to indoor air pollutants can lead to more severe health issues such as respiratory diseases, heart disease, and lung cancer. It is important to be aware of the potential risks and take steps to improve ventilation and air quality in the home, even if symptoms are not apparent.
To improve ventilation, it is recommended to increase the amount of outdoor air circulating indoors. This can be achieved through the use of fans, opening windows, or installing proper ventilation systems. Additionally, addressing any sources of indoor air pollution, such as unvented appliances or inefficient stoves, can help reduce the overall concentration of pollutants in the home.
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Tobacco smoke
The health effects of exposure to secondhand tobacco smoke are wide-ranging and severe. It is a known cause of lung cancer, cardiovascular disease, and reproductive issues, such as low birth weight. It can also trigger and exacerbate asthma, especially in children, and has been linked to sudden infant death syndrome and respiratory and ear infections in infants and children. The impact of tobacco smoke on respiratory health is significant, with pollutants causing irritation of the eyes, nose, and throat, and headaches, dizziness, and fatigue.
The dangers of tobacco smoke exposure are not limited to active smoking but also affect non-smokers, especially those who live with smokers. Tobacco smoke can move between rooms and even between apartment units, impacting the health of neighbours. While ventilation, filtration, and air cleaning techniques can reduce indoor secondhand smoke, they do not eliminate it.
The World Health Organization (WHO) has issued guidelines for indoor air quality, recommending against the use of certain fuels and emphasizing the importance of clean energy sources for cooking, space heating, and lighting. These guidelines aim to reduce household air pollution and protect the health of those exposed to secondhand smoke.
Given the serious health risks associated with tobacco smoke, it is essential to prioritize the adoption of clean household energy sources and technologies, such as solar power, electricity, and improved ventilation, to minimize exposure and protect the well-being of individuals and families.
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Construction materials
One of the most well-known and harmful chemicals found in construction materials is formaldehyde, a colourless, pungent-smelling gas. It is commonly found in pressed wood products like particleboard, hardwood plywood paneling, and medium-density fiberboard. Formaldehyde can cause a range of health issues, including watery eyes, a burning sensation in the eyes and throat, nausea, and difficulty breathing. It may also trigger asthma attacks and has been linked to cancer in animals and potentially in humans.
Volatile Organic Compounds (VOCs) are another group of chemicals commonly found in building materials. These chemicals have a low boiling point and readily vaporize at room temperature, releasing fumes into the air. VOCs can be found in solid and liquid building materials, including adhesives, varnishes, sealants, wallpapers, solvents, and cleansers. They can cause eye and respiratory tract irritation, dizziness, headaches, liver and kidney damage, and central nervous system issues.
Other harmful substances found in construction materials include flame retardants, which are added to insulation and furniture foam to slow the spread of fires but are linked to health issues such as cancer and reproductive problems. Perfluorinated compounds (PFCs) or PFOA are used in stain-resistant treatments for carpets and fabrics and have been linked to cancer and immune system disorders. Lead, while restricted, can still be found in older homes, posing risks such as brain and nervous system damage, especially to children.
Additionally, construction sites themselves can generate pollution, including air, water, soil, and noise pollution. Air pollution can be caused by construction work, while water pollution can result from surface water runoff and groundwater contamination by construction materials and chemicals. Noise pollution from construction work can also adversely affect health, leading to stress, sleep disturbances, high blood pressure, and hearing loss.
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Cleaning products
Common cleaning products such as soaps, polishes, and grooming supplies can contain ingredients that are hazardous to human health. For example, alkylphenol ethoxylates, a common surfactant ingredient in cleaners, have been shown to function as an "endocrine disrupter," causing adverse reproductive effects in wildlife exposed to polluted waters. Other ingredients containing phosphorus or nitrogen can contribute to nutrient-loading in water bodies, adversely affecting water quality. Volatile organic compounds (VOCs) are another class of chemicals commonly found in cleaning products, including aerosol spray products. VOCs vaporize at room temperature and contribute to indoor air pollution, leading to chronic respiratory problems, allergic reactions, and headaches. Studies have also linked exposure to VOCs to an increased risk of asthma, with cleaning industry workers having a 50% higher risk of developing the condition.
The use of cleaning products can also have environmental repercussions. When used, a large portion of the chemicals go down our drains, entering the sewer system, wastewater treatment facilities, and eventually our natural water bodies. While wastewater treatment systems are designed to break down chemicals, they are not equipped to filter out all the chemicals, leading to water pollution. Certain ingredients in cleaning products can also kill the beneficial bacteria in septic tanks, resulting in the release of untreated wastewater and toxins into surrounding waterways.
To mitigate the adverse effects of cleaning products, individuals can opt for eco-friendly alternatives. The U.S. Environmental Protection Agency's Safer Choice Program helps consumers identify products that are safer for human health and the environment. Consumers can also look for third-party certifications, such as the EWG VERIFIED® mark, indicating that products are formulated to reduce potential harm. Additionally, choosing fragrance-free options and improving ventilation during and after cleaning can help minimize exposure to harmful chemicals.
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Frequently asked questions
AI requires a lot of energy, which in most places comes from burning fossil fuels, producing planet-warming greenhouse gases. AI also requires hardware devices, the production and disposal of which require additional energy and materials, such as cobalt, silicon, gold, and other metals. The mining of these metals can lead to soil erosion and pollution.
AI is associated with carbon emissions, electronic waste, and potential harm to ecosystems. AI's computer processing demands spur increasing levels of air pollution from power plants and backup diesel generators. AI data centres also consume a lot of water, which is becoming scarce.
AI-related air pollution is expected to result in as many as 1,300 premature deaths per year by 2030 in the United States. The health costs, including premature deaths, were estimated using statistical methods that account for the epidemiological risks associated with air pollution from power plants and backup diesel generators. AI air pollution disproportionately affects certain low-income communities due to their proximity to power plants and backup generators.
