Helena Joyce
Air pollution is a pressing issue that poses significant risks to human health, particularly for children. It refers to the introduction of harmful substances, such as chemicals, gases, and particles, into the atmosphere, causing adverse effects on the planet and all life forms. While air pollution affects everyone, children are especially vulnerable due to their developing organs, higher breathing rates, and proximity to ground-level pollutants. Household air pollution, waste-related issues, traffic emissions, and outdoor sources like wildfires contribute to the degradation of air quality, with devastating consequences for children's health and well-being.
| Characteristics | Values |
|---|---|
| How kids are exposed to air pollution | Children are exposed to air pollution from household, waste-related, traffic-related, and landscape fires like wildfires. They are also exposed to secondhand smoke and dust and sand storms. |
| How kids are vulnerable to air pollution | Children's breathing rates are higher than those of adults, and they take in more air per kilogram of body weight. They breathe air closer to the ground where pollutants, especially from traffic exhausts, are emitted and become concentrated. Children inhale a larger fraction of air through their mouths, allowing pollution to penetrate deep into the lower respiratory tract. Children's organs, including their lungs, are still developing, which further increases the risk of health issues. |
| Health impacts of air pollution on kids | Air pollution can cause low birth weight, asthma, reduced lung function, respiratory infections, allergies, and increased risks of adult chronic diseases in children and adolescents. It is the second leading risk factor for death among children under five, after malnutrition. |
| Human causes of air pollution | Burning fossil fuels, factories, power plants, cars, airplanes, chemicals, fumes from spray cans, and methane gas from landfills. |
| Natural causes of air pollution | Volcanic eruptions, dust storms, and forest fires. |
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What You'll Learn
Children's higher susceptibility to air pollution
Children and adolescents are more susceptible to the adverse health effects of air pollution than adults. This is due to a variety of physiological, behavioural, and environmental factors.
Firstly, children have higher breathing rates than adults, and they also breathe more air per unit of body mass. This means they inhale a larger fraction of air through their mouths, allowing pollution to penetrate deep into the lower respiratory tract, which is more permeable. Secondly, children spend more time outdoors, engaging in physical play and activities, increasing their exposure to ambient air pollution. They also tend to breathe air closer to the ground, where the concentrations of some pollutants, especially from traffic exhausts, are higher. Moreover, children's bodies, brains, and organs, including their lungs, are still developing, which further increases the risk of adverse health effects. Their immature immune systems are more susceptible to infections and allergies, and their lungs are more vulnerable to the harmful effects of air pollution, which can lead to impaired lung function and development even after birth.
Prenatal exposure to air pollution can also have detrimental effects on the fetus, with studies showing a link between exposure to PM2.5 during pregnancy and decreased lung function in the child. Additionally, disruptions to the lungs' functional growth and repair mechanisms can render them more susceptible to acute respiratory infections and asthma. Poor children are systematically more exposed to and affected by air pollution than their better-off counterparts, with over 70% of deaths linked to household air pollution due to cooking with polluting fuels.
The vulnerability of children to air pollution underscores the urgency of implementing measures to improve air quality, especially in child-centric settings such as schools and kindergartens. It also highlights the importance of educating adults, who have the power to protect children and influence relevant policies, about the risks associated with air pollution.
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Household air pollution
The use of polluting fuels and technologies in the household also poses safety risks, especially for children. Kerosene, commonly used for cooking and lighting, is often sold in refilled soda bottles and is a leading cause of childhood poisonings. Open fires and unstable stoves also present risks of burns and scalds, resulting in serious injuries and even deaths, with children being particularly vulnerable.
Furthermore, household air pollution contributes to long-term health issues. Exposure to indoor air pollution has been linked to chronic obstructive pulmonary disease (COPD), lung cancer, stroke, and cardiovascular disease in adults. It is also associated with an increased risk of developing non-communicable diseases, including ischaemic heart disease. Evidence suggests that exposure to household air pollution during pregnancy may result in low birth weight and can have adverse effects on the developing foetus, impacting their health even before birth.
To mitigate household air pollution and its detrimental effects, it is crucial to promote the use of clean fuels and technologies. This includes adopting alternatives such as solar, electricity, biogas, liquefied petroleum gas (LPG), natural gas, alcohol fuels, and improved biomass stoves that meet emission targets outlined by organizations like WHO. By transitioning to cleaner sources, the health and well-being of children and families can be significantly improved, reducing the burden of diseases caused by household air pollution.
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Outdoor air pollution
Man-made sources of outdoor air pollution include road traffic, residential heating exhausts, factory emissions, and vehicle exhaust. Children are particularly vulnerable to the effects of outdoor air pollution due to several factors. Firstly, they breathe more rapidly than adults, inhaling more air relative to their body weight. Secondly, they often spend more time outdoors, engaging in physical activities, which increases their exposure to polluted air. Additionally, children tend to breathe air closer to the ground, where the concentrations of certain pollutants are higher.
The impact of outdoor air pollution on children's health is profound. It can cause respiratory infections, trigger asthma, and lead to childhood cancer. According to the World Health Organization (WHO), in 2016, approximately 600,000 children died from acute lower respiratory infections caused by polluted air. Outdoor air pollution also negatively affects neurodevelopment and cognitive abilities. Children exposed to high levels of air pollution are at an increased risk of developing chronic diseases, such as cardiovascular disease, later in life.
Furthermore, outdoor air pollution contributes to ground-level ozone formation, which is a powerful airway irritant. Climate change is expected to worsen air quality by increasing ground-level ozone and the frequency of wildfires, further exacerbating the impact of outdoor air pollution on children's health. It is important to recognize that outdoor air pollution affects everyone, but children, due to their developing bodies and increased exposure, face unique risks and vulnerabilities.
To mitigate the impact of outdoor air pollution on children, it is crucial to implement measures that reduce air pollution and protect children from exposure. This includes regulating emissions from vehicles and factories, promoting the use of cleaner energy sources, and improving air quality monitoring systems. By addressing outdoor air pollution, we can help ensure that children have the opportunity to grow and develop in a healthy environment.
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Human activity and air pollution
Human activity is a major contributor to air pollution, especially in large cities. Air pollution is caused by the introduction of harmful materials, known as pollutants, into the environment. These pollutants include unwanted chemicals, gases, and particles that enter the air and atmosphere, causing harm to the planet and all life on it.
Burning fossil fuels such as coal, oil, and natural gas is a significant source of air pollution. This releases various gases into the air, including carbon dioxide, methane, and smog-causing chemicals. Fossil fuels are burned for energy production, transportation, and industrial processes. Cars, airplanes, and factories are major sources of air pollution from fossil fuel combustion. In addition to the direct release of pollutants, burning fossil fuels can also lead to the formation of secondary aerosols through chemical reactions in the air.
Another human activity that contributes to air pollution is the release of methane gas from livestock and landfills. Methane is a potent greenhouse gas that traps heat in the atmosphere, contributing to global warming. Additionally, certain chemicals released from spray cans, such as chlorofluorocarbons (CFCs), damage the ozone layer, which protects us from harmful rays from the sun.
Human-caused air pollution also includes indoor air pollution, which can be particularly harmful to children. Household air pollution is often caused by cooking with polluting fuels, such as lignite coal, and the indoor use of open fires for cooking and heating. Over 70% of deaths in children under five due to air pollution were linked to household air pollution.
Furthermore, human activities such as construction, transportation, and industrial processes contribute to noise pollution, which can be disruptive and dangerous for both humans and wildlife. Noise pollution can interfere with communication and food sources for various species, including songbirds and marine animals.
It is important to recognize that human activities are not the sole cause of air pollution, as natural events such as volcanic eruptions, forest fires, and dust storms also play a role. However, human activities, particularly those associated with urbanization and industrialization, have significantly exacerbated the problem of air pollution.
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Natural causes of air pollution
Air pollution is caused by solid and liquid particles, known as aerosols, and certain gases that are suspended in the air. These particles and gases can be harmful to the planet and human health. While air pollution is largely a result of human activity, it can also be caused by natural processes. Here are some natural causes of air pollution:
Volcanic Eruptions
Volcanic eruptions emit toxic gases, including sulfur and chlorine, as well as ash particles, which can travel long distances and affect air quality. Volcanic activities contribute to the presence of aerosols in the atmosphere.
Wildfires
Wildfires release carbon monoxide and particulate matter containing organic contaminants into the atmosphere. They can be started by natural causes, such as lightning strikes, and can significantly impact air quality, particularly in localized areas.
Microbial Decay
Microorganisms present in the environment play a role in the natural decaying processes of living organisms and environmental contaminants. This activity results in the release of gases, particularly methane gas, which contributes to air pollution.
Radioactive Decay
Natural decay processes in the Earth's crust can release gases such as radon. This gas has the potential to accumulate in enclosed spaces, such as basements, and negatively impact air quality.
Dust Storms
Dust storms, common in arid and semi-arid regions, can mobilize and transport large amounts of dust and particulate matter over vast distances, affecting air quality and causing respiratory issues for those exposed.
It is worth noting that while these natural sources contribute to air pollution, human activities, such as the combustion of fossil fuels, industrial processes, and agricultural practices, are often the major drivers of air pollution globally.
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Frequently asked questions
Kids can pollute the atmosphere in several ways, often unknowingly. For example, when kids travel by car or plane, they contribute to air pollution. Cars and planes burn fossil fuels, releasing gases and particles into the atmosphere that cause harm to the planet and all life on it.
Air pollution affects everyone, but children and adolescents are especially vulnerable. Their bodies and organs, including their lungs, are still developing, and they breathe in more air relative to their body weight. Air pollution can cause low birth weight, asthma, reduced lung function, respiratory infections, allergies, and an increased risk of adult chronic diseases.
Some of the major sources of air pollution that harm children's health include household air pollution from cooking with polluting fuels, waste-related pollution, traffic-related pollution, landscape fires, second-hand smoke, and dust and sand storms.
Improving air quality around child-centric settings like schools and kindergartens can help reduce children's exposure to air pollution. Additionally, individuals can make simple changes to their lifestyles, such as using public transportation, riding bicycles, reducing energy use, and recycling, to help reduce air pollution.
