Greta Jimenez
Households contribute to environmental pollution through various means, including the use of polluting fuels and technologies for cooking, heating, and lighting. Around 2.1 billion people worldwide rely on solid fuels such as wood, coal, and animal dung, which are burned in inefficient stoves, releasing harmful pollutants like fine particulate matter and carbon monoxide. This results in indoor air pollution, which can lead to serious health issues such as respiratory illnesses, cardiovascular diseases, and lung cancer. Additionally, the design and quality of housing structures can pose health risks, including exposure to toxic paints and glues, extreme temperatures, and pest infestations. The real estate sector is responsible for a significant portion of global carbon dioxide emissions, with building operations and construction contributing to climate change. Furthermore, indoor pollution sources like cleaning products, dust mites, pet dander, and mould can also negatively impact air quality and human health.
| Characteristics | Values |
|---|---|
| Household air pollution | Burning of solid fuels like wood, coal, and animal dung releases harmful pollutants, including fine particulate matter and carbon monoxide. |
| Polluting fuels like kerosene and unprocessed coal are used for cooking and heating, emitting harmful pollutants. | |
| Inefficient stoves and lamps contribute to indoor air pollution and increase the risk of respiratory illnesses, cardiovascular diseases, and lung cancers. | |
| Indoor air quality risks | Dust, gases emitted by toxic building materials, radon exposures, and mould can cause respiratory infections, asthma, and allergies. |
| Cleaning products containing volatile organic compounds (VOCs) can cause headaches, nausea, and damage to vital organs. | |
| Secondhand smoke, inadequate ventilation, and unvented or malfunctioning appliances can increase indoor pollutant levels. |
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What You'll Learn
Household air pollution from cooking, heating, and lighting
Household air pollution is caused by the use of inefficient and polluting fuels and technologies for cooking, heating, and lighting. According to the World Health Organization (WHO), around 2.1 billion people worldwide rely on open fires or inefficient stoves fueled by kerosene, biomass (wood, animal dung, and crop waste), and coal for cooking. This generates harmful household air pollution, which was responsible for an estimated 3.2 million deaths per year in 2020, including over 237,000 children under the age of five.
The use of solid fuels, such as wood, charcoal, coal, and kerosene, releases dangerous particulate matter, carbon monoxide, and other toxic pollutants, leading to indoor air pollution levels that can be much higher than the WHO's air quality guidelines. Women and children are disproportionately affected by household air pollution as they typically spend more time near the domestic hearth and are exposed to harmful smoke from polluting stoves and fuels. The ingestion of kerosene is the leading cause of childhood poisonings, and the use of solid fuels for cooking and heating contributes to forest degradation and land use changes.
Indoor air pollution from cooking can also be caused by the use of natural gas stoves, which release carbon monoxide, formaldehyde, and other harmful pollutants. Cooking with a wood stove or fireplace can result in high levels of indoor air pollution from wood smoke. Self-cleaning ovens, whether gas or electric, can also create high levels of pollutants as food waste is burned away. Poorly ventilated kitchens can further exacerbate indoor air pollution from cooking.
To address household air pollution from cooking, heating, and lighting, the WHO has issued guidelines for indoor air quality and household fuel combustion, recommending the use of cleaner and more efficient fuels and technologies, such as solar, electricity, biogas, liquefied petroleum gas (LPG), natural gas, alcohol fuels, and improved biomass stoves. The U.S. Environmental Protection Agency (EPA) also works to increase the adoption of cleaner home cooking technologies and fuels that are affordable, reliable, efficient, and safer. Additionally, technological advancements, such as air purifiers and intelligent home systems, offer promising solutions for detecting and reducing indoor air pollutants.
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Indoor air quality risks from toxic building materials
The quality of the air inside homes and buildings is affected by a variety of factors, including the use of toxic building materials. Energy-efficient buildings that lack sufficient mechanical ventilation, for example, can lead to increased indoor pollutant concentrations.
Sources of Indoor Air Pollution
Indoor air pollution is caused by the release of harmful pollutants, such as fine particulate matter, carbon monoxide, and other toxins. These pollutants can come from combustion sources like tobacco smoke, wood-burning stoves, and coal heating appliances, as well as from building materials and household products.
Building materials, such as plywood, pressed wood products, paints, adhesives, and carpets, often contain chemicals that off-gas and release volatile organic compounds (VOCs) and formaldehyde into the indoor air. These chemicals can have short- and long-term health effects, including headaches, nausea, respiratory issues, and damage to vital organs.
Reducing Indoor Air Pollution
To reduce indoor air pollution from toxic building materials, it is important to prioritize the use of sustainable, non-toxic, and air-purifying materials. This includes ensuring proper ventilation during and after construction to limit off-gassing of pollutants. Building occupants should also be mindful of outdoor pollutants that can enter through open doors, windows, and ventilation systems, as well as pollutants that can be tracked indoors on shoes and clothing.
Additionally, the use of air purifiers and advanced environmental sensing technologies can help monitor and improve indoor air quality. In colder countries, improving building airtightness and insulation can reduce the risk of mould buildup, while warmer climates require a focus on ventilation to remove stale air and control moisture.
By addressing these factors and adopting sustainable design and construction practices, it is possible to mitigate the indoor air quality risks associated with toxic building materials and create healthier indoor environments.
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Poor ventilation leading to increased pollutant levels
Poor ventilation in homes can lead to increased levels of indoor air pollution, which has severe health implications. Inadequate ventilation occurs when there is little infiltration, natural ventilation, or mechanical ventilation, resulting in a low air exchange rate and allowing pollutant levels to increase. This is particularly concerning in dwellings that rely on polluting fuels and technologies, such as open fires or inefficient stoves fuelled by kerosene, biomass (wood, animal dung, and crop waste), or coal for cooking and heating. These fuels generate harmful household air pollution, including fine particulate matter, carbon monoxide, and various toxins. The indoor smoke produced by these fuels can contain fine particle levels up to 100 times higher than acceptable levels.
The lack of proper ventilation prevents outdoor air from entering and diluting indoor emissions, leading to the accumulation of pollutants. High temperature and humidity levels further exacerbate this issue by increasing pollutant concentrations. This is particularly detrimental to women and children, who are typically responsible for household chores involving polluting fuels and technologies, such as cooking and collecting firewood. As a result, they are exposed to harmful smoke and pollutants for prolonged periods, bearing the greatest health burden.
Indoor air pollution sources can vary and include building materials, household cleaners, and biological pollutants. Building materials and construction processes can contribute to poor indoor air quality, with certain paints and carpets releasing harmful chemicals. Household cleaners often contain volatile organic compounds (VOCs), which evaporate at room temperature and release gases that can cause short- and long-term health issues, including headaches, nausea, and damage to vital organs. Biological pollutants, such as dust mites, pet dander, and mould, can trigger allergies and respiratory issues, especially in individuals with weakened immune systems or pre-existing conditions.
The impact of indoor air pollution on health is significant. Pollutants can cause or contribute to infections, lung cancer, and chronic lung diseases such as asthma. They can also worsen existing lung conditions. Additionally, indoor air pollution has been linked to non-communicable diseases, including stroke, ischaemic heart disease, chronic obstructive pulmonary disease (COPD), and lung cancer. The fine particulate matter and other pollutants in household air pollution inflame the airways and lungs, impair the immune response, and reduce the oxygen-carrying capacity of the blood.
To mitigate the effects of poor ventilation and reduce indoor pollutant levels, it is crucial to improve ventilation in homes. This can be achieved through infiltration, natural ventilation by opening windows and doors, and mechanical ventilation using devices like outdoor-vented fans. Additionally, addressing the use of polluting fuels and technologies is essential. Implementing clean fuels and technologies, such as solar, electricity, biogas, liquefied petroleum gas (LPG), and improved stoves, can significantly reduce household air pollution and its associated health risks.
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Household chores using inefficient devices and fuels
Household chores, such as cooking, heating, and lighting, are often carried out using inefficient devices and fuels, leading to significant indoor air pollution and adverse health impacts. Burning solid fuels like wood, charcoal, coal, kerosene, animal dung, and crop waste releases harmful pollutants, including particulate matter, carbon monoxide, and other toxins. These emissions contribute to poor indoor air quality and have been linked to various health issues, including respiratory infections, asthma, allergies, heart disease, stroke, and lung cancer.
Inefficient stoves and open fires are major contributors to indoor air pollution. Around 2.1 billion people worldwide rely on these methods for cooking, exposing themselves to harmful smoke and pollutants. The World Health Organization (WHO) has issued guidelines for indoor air quality, recommending against the use of certain fuels, such as kerosene, and promoting cleaner alternatives like biogas, electricity, ethanol, liquefied petroleum gas (LPG), and natural gas.
The use of polluting fuels and technologies disproportionately affects women and children, who typically perform household chores and spend more time near the domestic hearth. They are at risk of musculoskeletal injuries from gathering firewood and are exposed to harmful smoke from inefficient stoves. Additionally, the ingestion of kerosene is the leading cause of childhood poisonings, and severe burns and injuries are often linked to household energy use for cooking, heating, and lighting.
Furthermore, the reliance on solid fuels for household chores contributes to environmental degradation. Wood collection for cooking and heating leads to forest degradation, land use changes, and the loss of wildlife habitats. Unsustainable harvesting of wood fuel is prevalent, with up to 34% being collected unsustainably. This, in turn, contributes to climate change and the degradation of local environments.
Transitioning to improved biomass stoves or clean-fuel stoves can significantly reduce emissions and improve health outcomes. Clean-fuel stoves can reduce emissions by more than 95%, and improved biomass stoves can achieve a reduction of 50-80%. These alternatives offer a more sustainable and healthier approach to household chores, mitigating the environmental and health impacts associated with inefficient devices and fuels.
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Health risks from exposure to extreme temperatures
Houses can pollute the environment in a variety of ways, from the use of specific building materials to the use of polluting fuels for cooking, heating, and lighting. While indoor air pollution is a significant issue, another critical aspect is the impact of extreme temperatures on human health, which can be exacerbated by the design and infrastructure of residential spaces.
The frequency and intensity of extreme heat waves are expected to increase due to climate change, posing significant health risks to vulnerable populations. Extreme temperatures can lead to cumulative stress on the human body, increasing the likelihood of illness and death. Older adults, young children, and individuals with chronic medical conditions are particularly susceptible to heat-related illnesses and face a higher risk of mortality.
The body's inability to regulate internal temperature during periods of high temperatures, high humidity, low wind, and high thermal radiation can result in heat exhaustion and heatstroke. The strain on the body as it attempts to cool itself also stresses vital organs like the heart and kidneys. Prolonged exposure to extreme heat can worsen existing health conditions, including cardiovascular, respiratory, mental health, and diabetes-related issues.
The design of cities and housing materials often amplifies human exposure to excess heat. The loss of green spaces and the use of inappropriate materials, such as metal roofs, contribute to the accumulation of urban heat. This problem is more prevalent in tropical and subtropical climates, where populations are chronically exposed to high temperatures.
The health risks associated with extreme temperatures extend beyond physical ailments. Research suggests that hot days are linked to a higher risk of emergency room visits for substance abuse, mood and anxiety disorders, schizophrenia, and dementia. Additionally, high temperatures can negatively impact cognition, mood, and other aspects of mental health and well-being.
To mitigate the health risks associated with extreme temperatures, it is essential to prioritize practical interventions at various levels, including individual, community, organizational, and governmental efforts. Staying in air-conditioned spaces, drinking plenty of fluids, scheduling outdoor activities carefully, and wearing lightweight and light-colored clothing are essential strategies to combat heat-related illnesses.
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Frequently asked questions
Household air pollution is caused by the use of polluting fuels and technologies for cooking, heating, and lighting. Around 2.1 billion people cook using open fires or inefficient stoves fuelled by biomass (wood, animal dung, and crop waste), charcoal, kerosene, and coal. These emit harmful pollutants, including fine particulate matter, black carbon, and carbon monoxide.
Household air pollution has severe health impacts, particularly on women and children who are typically responsible for household chores such as cooking and collecting firewood. It leads to non-communicable diseases, including stroke, ischaemic heart disease, chronic obstructive pulmonary disease (COPD), and lung cancer. In 2020, household air pollution was responsible for an estimated 3.2 million deaths per year, including over 237,000 children under the age of five.
To reduce household air pollution, it is recommended to transition to cleaner fuels and technologies, such as switching from kerosene lamps to central heating systems that operate on natural gas or liquefied petroleum gas fuels. Additionally, proper ventilation and the use of air purifiers can help improve indoor air quality by removing pollutants.
