Kiera Jefferson
Environmental pollutants are harmful chemicals that enter the environment due to human activity or natural events like volcanic eruptions. They contaminate the water, air, and soil, and exposure to them can have adverse effects on human health. Pollutants can be inhaled, orally ingested, or absorbed through the skin, and they can cause both acute and chronic disorders. Air pollution, in particular, is a significant environmental health hazard, contributing to respiratory and lung diseases, cancer, and even premature death. It affects everyone, but certain groups, such as children, the elderly, and people from low-income communities, are more vulnerable to its detrimental effects.
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What You'll Learn
Air pollution and respiratory issues
Air pollution is a major threat to global health and prosperity. It is a mix of hazardous substances from both human-made and natural sources. Some air pollution is not visible but can be smelled. Air pollution is responsible for more than 6.5 million deaths each year globally, a number that has increased over the past two decades.
Air pollution can cause respiratory issues and increase the risk of lung infections. Studies have shown that air pollution is linked to respiratory health effects, including coughing, phlegm, wheezing, and decreased lung function. It can also trigger asthma attacks and cause wheezing and coughing in people with asthma. In addition, air pollution can worsen many breathing and lung diseases, leading to hospitalizations, cancer, or even premature death.
Children are more at risk than adults because their lungs are still developing, and they breathe faster, taking in more polluted air. Being exposed to pollution as a child increases the risk of developing asthma and chronic obstructive pulmonary disease (COPD) as an adult. Exposure to air pollution during infancy has been associated with an increased risk of childhood asthma and decreased lung function, with long-term respiratory consequences.
Pregnant women exposed to high levels of pollution are also at risk. Research suggests that exposure to air pollution during pregnancy may increase the risk of asthma in the unborn baby, whether or not the mother has asthma herself.
Certain groups are more vulnerable to the adverse health impacts of air pollution. Low-income communities and minority populations are disproportionately exposed to air pollution and are more likely to suffer from respiratory issues as a result. Additionally, people with pre-existing respiratory diseases, such as asthma, COPD, or lung cancer, are more susceptible to the harmful effects of air pollution.
Agricultural practices, such as burning crop remnants, can also contribute to poor air quality and respiratory issues, especially in children. Exposure to smoke from agricultural burns, even for a short duration, can worsen respiratory health outcomes.
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The impact of pollutants on pregnancy and children
Air pollution is a mix of hazardous substances from both human-made and natural sources. It is a major threat to global health and prosperity and is responsible for millions of deaths each year. Certain groups are more vulnerable to the adverse health impacts of air pollution, including people with lung diseases, such as asthma, chronic bronchitis, emphysema, and chronic obstructive pulmonary disease (COPD).
Pregnant women, in particular, are vulnerable to the effects of air pollution. Research has shown that exposure to air pollution during pregnancy can have adverse effects on both the mother and the developing fetus. For example, a study of pregnant women in Beijing during a period of mandated lower emissions and improved air quality found that their babies were, on average, heavier than babies born to mothers who delivered during the same calendar months in previous years. Additionally, exposure to air pollution during pregnancy has been linked to an increased risk of preterm birth, low birth weight, congenital malformations, and neonatal mortality.
Maternal smoking and exposure to secondhand smoke during pregnancy can also impact infant lung development and increase the risk of respiratory infections, wheezing, and asthma in children. Exposure to air pollution during pregnancy has also been associated with an increased risk of autism and other neurological disorders in children.
Children are another vulnerable group when it comes to the effects of air pollution. Studies have shown that exposure to air pollution can worsen children's respiratory health, with agricultural burns and indoor air pollution contributing to higher rates of asthma. Additionally, exposure to indoor air pollutants such as radon, smoke, and lead dust can trigger breathing problems, allergic symptoms, or asthma attacks in children.
Overall, air pollution has been linked to a range of negative health outcomes in pregnant women and children, including respiratory issues, neurological disorders, and increased risk of certain diseases. It is important for individuals in these vulnerable groups to take precautions to avoid exposure to air pollution and for policymakers to implement measures to improve air quality.
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Pollutants and cancer
Environmental contaminants significantly contribute to human disease, affecting climate change, and public and individual health, resulting in increased mortality and morbidity. Human activities introduce pollutants by polluting the water, air, and soil. Inhalation, oral absorption, and ingestion are the three main ways that contaminants enter the human body.
Air pollution is a familiar environmental health hazard. It is a major threat to global health and prosperity. Air pollution, in all forms, is responsible for more than 6.5 million deaths each year globally, a number that has increased over the past two decades. Air pollution affects everyone, but certain groups may be harmed more. Almost 9 out of 10 people who live in urban areas worldwide are affected by air pollution. Research indicates there are racial or ethnic and socioeconomic disparities in air pollution emissions. People with annual incomes above $70,000 generally experience greater declines in industry, energy, transportation, residential, and commercial-related emissions than those with lower incomes.
Air pollution is linked to lung cancer. Overwhelming evidence shows that particle pollution in the outdoor air we breathe—from vehicle exhaust, coal-fired power plants, and other industrial sources—can cause lung cancer. Particle pollution increases the risk of dying early, heart disease, and asthma attacks, and it can also interfere with the lung's growth and function. Smaller particles are more dangerous than larger ones as they get trapped deep in the lungs and can even enter the bloodstream, causing damage to our health. In 2013, an 8-year-old girl in China was diagnosed with lung cancer, and her doctor attributed her illness to air pollution.
Indoor air pollution, such as radon, can also cause lung cancer. Common indoor air pollutants include radon, smoke, and lead dust. Carbon monoxide from a faulty furnace, mould from damp walls, or volatile organic compounds from a newly painted room also contaminate indoor air. Biological pollutants, such as mould, pollen, animal dander, dust mites, and cockroaches, may trigger breathing problems, allergic symptoms, or asthma attacks. Tobacco smoke contains some 200 known poisons, such as formaldehyde and carbon monoxide, and at least 60 chemicals known to cause cancer.
A new study suggests that air pollution is also associated with an increased risk of mortality for several other types of cancer, including breast, liver, and pancreatic cancer.
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Indoor pollution
Indoor air quality is a serious environmental health hazard. Americans, for instance, spend approximately 90% of their time indoors, where the concentrations of some pollutants are often two to five times higher than outdoor concentrations. Indoor pollution sources that release gases or particles into the air are the primary cause of indoor air quality problems.
There are many sources of indoor air pollution, including building materials, household cleaners, biological pollutants, and more. Common indoor air pollutants include radon, smoke, and lead dust. Carbon monoxide from a faulty furnace, mould from damp walls, or volatile organic compounds from a newly painted room also contaminate indoor air. Biological pollutants such as mould, pollen, animal dander, dust mites, and cockroaches may trigger breathing problems, allergic symptoms, or asthma attacks. Tobacco smoke, which consists of harmful chemicals like benzene, cadmium, arsenic, formaldehyde, and nicotine, is responsible for various illnesses, including cancer.
Indoor air pollution can affect people differently, and symptoms may show up immediately or years later. Immediate symptoms include irritation of the eyes, nose, and throat, headaches, dizziness, and fatigue. These immediate effects are usually short-term and treatable, and sometimes treatment simply involves eliminating the person's exposure to the source of pollution. However, repeated exposure to indoor air pollutants can worsen symptoms and lead to more severe health issues over time.
To reduce indoor air pollution, proper ventilation is critical. The US EPA's Indoor Environments Division (IED) provides guidance and programs to help communities understand and avoid indoor health impacts. Additionally, the World Economic Forum's Alliance for Clean Air brings together business leaders to prioritize air quality, reduce emissions, and drive impactful action in the climate movement.
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The impact of pollution on low-income communities
Environmental contaminants contribute significantly to human disease, affecting climate change, and public and individual health, resulting in increased mortality and morbidity. Pollution affects everyone's health, but certain groups are harmed more than others. Air pollution is a major threat to global health, causing more than 6.5 million deaths each year.
Low-income communities are disproportionately affected by pollution due to a combination of factors, including a lack of emissions regulations and enforcement, the proximity of pollution sources to low-income neighborhoods, and the excessive political power of large emitters. As a result, low-income individuals suffer from physical and mental health consequences, as well as impaired cognitive function. According to a Yale study, people in low-income communities breathe more hazardous particles than those in affluent communities. The study found that census tracts with a larger proportion of Hispanics had significantly higher levels of 11 substances, including nickel, nitrate, silicon, vanadium, and aluminum.
Several studies have found a link between air pollution and adverse birth outcomes. Reducing PM2.5 exposure could lead to significant reductions in low-birth weight and pre-term births worldwide, especially in low- and middle-income countries. Additionally, improving air quality may improve cognitive function and reduce the risk of dementia.
Overall, the disproportionate impact of pollution on low-income communities highlights the need for targeted interventions, regulations, and community organizing to reduce emissions, improve air quality, and mitigate the health consequences for vulnerable populations.
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Frequently asked questions
Pollutants are harmful chemicals that enter the environment through human activity or natural events. They can contaminate the water, air, and soil.
Pollutants can enter our bodies through inhalation, oral absorption, and ingestion.
Pollutants have been linked to various health issues, including respiratory and lung diseases, cancer, neurological problems, and metabolic diseases. They can also trigger allergies and asthma attacks, and cause eye and throat irritation.
People with pre-existing health conditions, children, the elderly, and those from low-income communities are often more vulnerable to the health impacts of pollutants.
Reducing exposure to pollutants can help mitigate health risks. This can be achieved through regulatory interventions, improved waste management, and the adoption of cleaner technologies, such as transitioning from fossil fuels to cleaner energy sources.
