Meghan Hodges
Coal is a fossil fuel and non-renewable energy source that is combusted to generate electricity. It is an abundant and inexpensive fuel source, but it is also a major contributor to environmental pollution and has been linked to a range of negative health outcomes. Coal-fired power plants release large quantities of particles, aerosols, and toxic heavy metals into the atmosphere, leading to air pollution and global warming. The inhalation of these hazardous substances can cause respiratory and cardiovascular disease, systemic inflammation, neurodegeneration, and other severe health issues. Coal mining operations can also alter landscapes and contaminate groundwater, further contributing to environmental degradation. While efforts have been made to reduce coal pollution, it remains a significant concern, with coal being recognised as the most polluting way to produce electricity.
| Characteristics | Values |
|---|---|
| Pollution | Coal is the most polluting way to generate electricity. |
| Greenhouse gases | Coal releases massive amounts of greenhouse gases. |
| Health impacts | Coal is linked to asthma, cancer, heart and lung disease, stroke, and chronic respiratory diseases. |
| Toxic substances | Coal emits toxic and carcinogenic substances into the air, water, and land. |
| Particulate matter | Coal releases "soot," or fine particulate matter, which is linked to chronic bronchitis, aggravated asthma, cardiovascular issues, and premature death. |
| Heavy metals | Coal releases toxic heavy metals such as mercury, lead, cadmium, and arsenic. |
| Environmental impact | Coal contributes to global warming, acid rain, and ecological disruption. |
| Water pollution | Coal mining and ash storage can contaminate groundwater and harm aquatic wildlife. |
| Landscape alteration | Coal mining can change the landscape, including removing mountaintops and filling valleys. |
| Clean energy alternatives | Clean and renewable energy sources are increasingly being adopted, reducing the reliance on coal. |
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What You'll Learn
Coal is the most polluting electricity generator
Coal is an abundant and inexpensive fuel source, but it is also a highly polluting one. Coal is a fossil fuel, and when it is burned to generate electricity, it releases large amounts of pollution, damaging the environment and contributing to climate change.
Coal-fired power plants emit toxic heavy metals, such as mercury, lead, cadmium, and arsenic, as well as carbon monoxide, volatile organic compounds (VOCs), and particulate matter. These pollutants have been linked to a range of severe health problems, including asthma, heart and lung disease, and cancer. In the United States alone, air pollution from coal-fired power stations contributes to four of the five leading causes of mortality: heart disease, cancer, stroke, and chronic respiratory diseases. The inhalation of coal particles and the associated hazardous substances also poses a risk to human health, triggering respiratory and cardiovascular disease, systemic inflammation, and neurodegeneration.
The environmental impact of coal mining and extraction also cannot be overlooked. Mountaintop removal and valley fill mining, for example, have severely altered the landscape of the Appalachian Mountains in West Virginia and Kentucky. This type of coal extraction involves removing the tops of mountains with explosives, changing the geography of the region. The water draining from these filled valleys may contain pollutants that can harm aquatic life downstream, further contributing to the environmental impact of coal as an energy source.
While some technologies, such as carbon capture and storage (CCS), have emerged to reduce carbon dioxide emissions from coal plants, these technologies are still expensive and unproven at scale. Additionally, CCS does not address the other harmful pollutants produced by coal power plants.
Overall, coal is the most polluting way to generate electricity, and its use has severe consequences for both human health and the environment.
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Coal releases harmful greenhouse gases
CO2 emissions from the combustion of fossil fuels, including coal, are the primary driver of global warming. Global warming has far-reaching consequences, including rising temperatures, accelerating sea level rise, and increasing risks of drought, heat waves, heavy rainfall, intensified storms, and species loss.
Coal-fired power plants also emit toxic pollutants such as mercury, lead, cadmium, arsenic, and particulate matter, which have severe impacts on human health and the environment. These pollutants are linked to various health issues, including asthma, heart and lung disease, cancer, neurological problems, and premature death.
The health impacts of coal pollution are significant, with high associated mortality rates. In the US, 50,000 coal-related deaths are recorded annually, and in Australia, coal's health impacts cost taxpayers an estimated $2.4 billion each year. Researchers have found that between 1999 and 2020, approximately 460,000 deaths were attributed to fine particulate air pollutants emitted by coal-fired power plants.
While some pollution control technologies, such as scrubbers, have been effective in reducing emissions and improving health outcomes, the deployment of carbon capture and storage technologies (CCS) to mitigate CO2 emissions from coal plants is still in its early stages and remains expensive compared to cleaner forms of energy generation.
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Coal mining changes the landscape
Coal is a major source of fuel and energy, and its mining has a range of environmental impacts, including changes to the landscape. Coal mining can cause land subsidence, alter water structures, and lead to the destruction of rural settlements.
In the United States, surface mines, or strip mines, are a common method of coal extraction, accounting for about 63% of coal mined in 2022. This involves removing the soil and rock above coal deposits, which can change the landscape. Mountaintop removal and valley fill mining, for example, have significantly altered the Appalachian Mountains in West Virginia and Kentucky. This technique uses explosives to remove mountain tops, and the resulting rock and dirt can cover streams and valleys. The water draining from these filled valleys may contain pollutants harmful to aquatic life.
In China, coal mining has led to dramatic regional land-use changes, particularly in coal-resource-based cities like Huaibei City. Mining subsidence has resulted in the conversion of terrestrial landscapes into terrestrial-wetland landscapes, with an increase in water-logged and inundated land. This has impacted the city's water structure and ecosystem, and led to the decline of cultivated land. The expansion of water areas has also forced the relocation of villages, affecting the lives and livelihoods of rural residents.
In Australia, the Curragh coal mine site has undergone significant vegetation changes due to mining activities. While rehabilitation and vegetation establishment efforts have been implemented, the spatial extent and pattern of disturbance and recovery in mining areas remain dynamic and challenging to assess.
Overall, coal mining can have significant impacts on the landscape, altering land use, water structures, and ecosystems. These changes can have far-reaching consequences for both the environment and local communities, highlighting the importance of effective regulation, planning, and rehabilitation measures to mitigate these impacts.
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Coal releases toxic and carcinogenic substances
Coal-fired power plants emit hazardous pollutants such as carbon monoxide, volatile organic compounds (VOCs), arsenic, and heavy metals like mercury and lead. These pollutants have been linked to various health issues, including asthma, heart disease, lung ailments, neurological problems, and cancer. Inhalation of coal particles and nanoparticles can also lead to respiratory and cardiovascular disease, systemic inflammation, and neurodegeneration.
Mercury, a toxic heavy metal emitted by coal plants, can cause neurological, digestive, and immune system damage. Fine particulate matter, known as "soot," is another dangerous pollutant linked to chronic bronchitis, aggravated asthma, cardiovascular issues, and premature death. According to the Union of Concerned Scientists, coal plants in the US emitted 197,286 tons of small airborne particles in 2014.
The health impacts of coal pollution are significant. In the United States, coal-related air pollution contributes to approximately 50,000 deaths annually, with similar impacts observed in other countries. For instance, in Australia, coal-related health issues cost taxpayers an estimated $2.4 billion annually, and coal dust diseases like "black lung" have re-emerged, causing life-threatening conditions.
While carbon capture and storage technologies (CCS) are emerging to mitigate CO2 emissions from coal plants, they are expensive and do not address other harmful pollutants produced during coal combustion. Therefore, transitioning to cleaner energy sources and implementing pollution control technologies, such as emissions scrubbers, are crucial steps in reducing the toxic and carcinogenic substances released by coal.
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Coal is linked to asthma, cancer, and heart disease
Coal is a significant source of air pollution and is linked to asthma, cancer, and heart disease.
Asthma
Coal-fired power plants release air pollutants, including sulfur dioxide, nitrogen oxides, and fine particles (PM2.5). These pollutants are harmful to people with asthma, leading to increased symptoms, emergency room visits, hospitalizations, and even deaths. Research in Louisville, Kentucky, found that reductions in sulfur dioxide emissions from coal-fired power plants resulted in fewer hospitalizations and emergency department visits due to asthma. The study also observed a decrease in the use of rescue inhalers, indicating improved asthma management.
Cancer
The International Agency for Research on Cancer has classified indoor emissions from household coal combustion as human carcinogens. Coal combustion products contain carcinogens such as PAHs, and exposure to coal smoke is a known lung carcinogen. Studies from North America, Europe, and Asia have consistently found an association between lung cancer and coal use, particularly in Asia. The link between coal smoke exposure and lung cancer risk is independent of smoking status, suggesting that coal combustion plays a direct role in carcinogenesis.
Heart Disease
Cardiovascular diseases, including heart attacks, have been linked to air and water contamination in coal mining regions. Specifically, Appalachian coal mining communities have reported higher rates of coronary heart disease and heart attack morbidity. Mountaintop removal and valley fill mining practices in this region have altered the landscape and contaminated waterways. While coal mining and processing release toxicants that contribute to cardiovascular health risks, further research is needed to fully understand the impact on local communities.
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Frequently asked questions
Coal is a fossil fuel and non-renewable energy source that is combusted to generate electricity.
Coal is the most polluting way to generate electricity. It releases massive amounts of pollution, including greenhouse gases, toxic and carcinogenic substances, and particulate matter, which have severe impacts on human health and the environment.
Coal pollution has been linked to asthma, cancer, heart and lung ailments, neurological problems, respiratory and cardiovascular disease, systemic inflammation, neurodegeneration, and premature death. It is also a significant contributor to climate change, which poses additional risks to human health.
