Kiera Jefferson
Coal is an abundant and inexpensive fuel source, but it is also one of the most polluting ways to produce electricity. The combustion of coal releases carbon dioxide (CO2), which is the primary greenhouse gas produced from burning fossil fuels. In 2022, coal-fired power plants contributed to about 19% of total US energy-related CO2 emissions and 55% of total CO2 emissions from the electric power sector. Coal-fired power plants also emit toxic pollutants such as mercury, lead, sulfur dioxide, nitrogen oxides, and particulate matter, which have been linked to various health issues, including asthma, cancer, heart and lung disease, and neurological problems. The environmental impacts of coal mining and combustion are significant, with mountaintop removal mining altering landscapes and polluting waterways. As a result, there is a growing transition towards cleaner sources of electricity to mitigate the worst impacts of coal on the environment and public health.
| Characteristics | Values |
|---|---|
| Type of pollution | Air, water, and land |
| Pollutants | Carbon dioxide (CO2), mercury, lead, sulfur dioxide, nitrogen oxides, particulate matter ("soot"), heavy metals, fly ash, bottom ash, acid rain |
| Health impacts | Asthma, cancer, heart and lung ailments, neurological problems, brain damage, bronchitis, aggravated asthma, cardiovascular effects, premature death |
| Environmental impacts | Global warming, climate change, rising temperatures, accelerating sea level rise, droughts, heatwaves, heavy rainfall, intensified storms, species loss, acid rain, wildfires, groundwater contamination |
| Coal production impacts | Landscape changes, stream and valley obliteration, pollution of waterways and drinking water supplies |
| Coal power plant emissions | US coal power plants emitted more than 3.1 million tons of sulfur dioxide and 1.5 million tons of nitrogen oxides in 2014 |
| Coal-related deaths | In China, 366,000 deaths in 2013; in India, 169,000 deaths annually; in the US, 50,000 deaths annually |
| Solutions | Carbon capture and storage technologies (CCS), cleaner energy sources, emission reduction policies |
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What You'll Learn
- Coal power's health impacts: asthma, cancer, heart and lung disease, neurological problems, and premature death
- Environmental impact: global warming, acid rain, and ecological disruption
- Carbon capture and storage: a potential solution to reduce CO2 emissions
- Coal mining techniques: surface mines, mountaintop removal, and valley fill mining
- Policy interventions: Clean Air Act, Clean Water Act, and emissions limits
Coal power's health impacts: asthma, cancer, heart and lung disease, neurological problems, and premature death
Coal-fired power plants have been linked to a range of adverse health effects, including asthma, cancer, heart disease, lung disease, neurological problems, and premature death. The pollution generated by burning coal contains a range of toxic substances that can have severe impacts on human health.
One of the most significant health impacts of coal power is the increased risk of respiratory diseases, including asthma and lung cancer. The particulate matter, or soot, released during coal combustion is linked to chronic bronchitis and aggravated asthma. Additionally, nitrogen oxides (NOx), which are visible as smog, irritate lung tissue, making people more susceptible to chronic respiratory diseases.
Coal power plants also emit harmful pollutants such as mercury, a toxic heavy metal. Mercury can damage the nervous, digestive, and immune systems, leading to potential neurological problems. Other heavy metals and radioactive materials in coal ash, a waste product of coal-fired plants, pose additional health risks, including cardiovascular diseases and lung cancer.
The health consequences of coal power extend beyond respiratory and neurological issues. Studies have shown that people living near coal-fired power plants have higher death rates and premature deaths, along with increased risks of cardiovascular disease. The pollution from coal plants can also lead to low birth weights and a higher risk of developmental and behavioral disorders in infants and children.
The impact of coal power on cancer incidence is also significant. The International Agency for Research on Cancer (IARC) has linked particulate air pollution to lung cancer, and estimates suggest that ambient air pollution caused hundreds of thousands of lung cancer deaths globally in recent years. Additionally, coal plants contribute to acid rain and global warming, further exacerbating their environmental and public health impacts.
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Environmental impact: global warming, acid rain, and ecological disruption
Coal is an abundant and inexpensive fuel source, but its production and use have significant environmental impacts. In 2022, coal burning for energy accounted for about 19% of total US energy-related CO2 emissions and 55% of total CO2 emissions from the electric power sector. As a fossil fuel, coal produces carbon dioxide (CO2), the primary greenhouse gas contributing to global warming. CO2 emissions from coal-fired power plants are a major driver of climate change, with the electric power sector being a significant contributor.
Coal-fired power plants also release pollutants such as mercury, heavy metals, fly ash, and bottom ash. Mercury emissions from coal plants have been linked to neurological and developmental damage in humans and animals. Heavy metals released during coal burning can have similar adverse effects. Fly ash and bottom ash, the residues from coal combustion, are often stored near power plants or disposed of in landfills. However, these disposal methods can lead to environmental concerns as the coal ash may leach into the ground and contaminate groundwater sources. Additionally, coal ash impoundment failures can cause significant environmental damage downstream.
To address these environmental challenges, the US has implemented air and water pollution laws, such as the Clean Air Act and the Clean Water Act, which mandate the reduction of pollutants released into the air and water. The coal industry has responded by developing methods to reduce impurities in coal, improving coal cleaning processes, and adopting low-sulfur coal. Power plants utilize flue gas desulfurization equipment ("scrubbers") to remove sulfur from smoke before it exits smokestacks. Electrostatic precipitators and baghouses are also employed to capture particulates and heavy metals from the smoke.
Underground coal mining can also contribute to ecological disruption. While it generally has a less severe impact on the landscape compared to surface mining, underground mines face risks of ground collapse and the release of acidic water. Additionally, methane gas, which occurs naturally in coal deposits, can accumulate in underground mines and pose explosion hazards. To mitigate these risks, coalbed methane must be vented out of mines to improve safety conditions.
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Carbon capture and storage: a potential solution to reduce CO2 emissions
Coal-fired power plants produce significant amounts of pollution, with emissions of SO2, NOx, and CO2 increasing by 56%, 335%, and 442%, respectively, between 1990 and 2010. As countries continue to rely on coal-based electricity generation, it is essential to explore solutions to reduce these emissions and mitigate their environmental impact.
Carbon capture and storage (CCS) is a promising technology that can substantially reduce CO2 emissions from coal-fired power plants and other industrial sources. CCS involves capturing CO2 at the source, such as power generation or industrial processes like cement production, followed by transportation and permanent storage deep underground in geological formations. This technology has been in operation since 1972 in the United States, effectively capturing and storing over 200 million tons of CO2.
CCS can significantly reduce CO2 emissions from fossil fuel power stations by over 95%. By capturing and isolating CO2, CCS can even enable negative emissions, particularly when coupled with biomass fuel sources. This is because biomass, such as wood or agricultural waste, absorbs CO2 during its lifetime, and burning it with CCS ensures the captured CO2 is removed from the atmosphere.
However, it is important to note that capturing and compressing CO2 is energy-intensive, increasing the fuel needs of coal-fired power plants. Additionally, there is ongoing debate about how much CCS should be relied on as a climate solution. While it can play a crucial role in reducing emissions, it should be considered alongside other mitigation strategies to address global warming effectively.
Regulatory frameworks for geological CO2 storage are being developed worldwide, with monitoring processes in place to ensure the safe and effective storage of CO2. As the world transitions towards a more sustainable future, CCS offers a potential solution to reduce CO2 emissions from coal-fired power plants, contributing to the larger goal of limiting temperature increases and mitigating the impacts of climate change.
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Coal mining techniques: surface mines, mountaintop removal, and valley fill mining
Coal is an abundant and inexpensive fuel source, but its production and use have significant environmental impacts. In 2022, carbon dioxide (CO2) emissions from burning coal for energy accounted for about 19% of total US energy-related CO2 emissions and 55% of total CO2 emissions from the electric power sector. Coal mining techniques, such as surface mining, mountaintop removal mining (MTR), and valley fill mining, contribute to these emissions and have other environmental and social impacts.
Surface mining, also known as strip mining, involves removing the soil and rock above coal deposits or seams. In 2022, surface mines accounted for about 63% of the coal mined in the United States, with the largest surface mines located in Wyoming's Powder River Basin. Surface mining is often more cost-effective than underground mining and allows for the extraction of thin seams of coal that traditional underground mining cannot access. However, it can alter landscapes and produce large volumes of excess spoil disposal, requiring the construction of valley fills.
Mountaintop removal mining (MTR) is a form of surface mining that involves the topographical alteration or removal of summits, hills, or ridges to access buried coal seams. MTR utilizes explosives and large machinery, allowing for a higher yield of coal per worker per hour compared to traditional underground mining. MTR is most commonly practiced in the Appalachian Mountains, particularly in West Virginia and Eastern Kentucky, the top two coal-producing states in Appalachia. From 1985 to 2015, MTR in the United States resulted in the mining of 2,900 km2 of land, leading to the destruction of more than 500 mountains and the burial of 3,200 km of streams.
Valley fill mining is a process associated with mountaintop removal and surface mining. It involves disposing of the excess rock and soil, or overburden, from mining activities into adjacent valleys. These filled valleys, known as "holler fills" or "valley fills," can lead to significant alterations in aquatic ecosystems, including the loss of streams, elevated chemical ion concentrations, degraded water quality, and increased selenium concentrations toxic to fish and birds. The construction of valley fills can also result in large-scale landscape changes.
While coal mining techniques have improved efficiency and reduced labour intensity, they have also contributed to environmental pollution and ecological damage. Efforts to mitigate these impacts include the Surface Mining Control and Reclamation Act of 1977, which prioritizes the restoration of land and water resources, and the development of technologies to remove impurities from coal and reduce emissions of pollutants such as sulfur dioxide, nitrogen oxides, mercury, and particulate matter. Additionally, research is underway to address CO2 emissions through methods like carbon capture and the reuse and recycling of waste produced from burning coal.
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Policy interventions: Clean Air Act, Clean Water Act, and emissions limits
The Clean Air Act, Clean Water Act, and emissions limits have been crucial in reducing pollution from coal power and other sources. Here is an overview of the policy interventions:
Clean Air Act
The Clean Air Act, enacted in 1970, has played a pivotal role in reducing air pollution, combating climate change, and safeguarding public health. The Act has been instrumental in decreasing air pollution over the past few decades, particularly since the 1960s. It empowers the federal government to regulate and curb greenhouse gas emissions, which is essential for mitigating global climate change.
The Clean Air Act has been amended over time, such as through the Inflation Reduction Act of 2022, which reinforced that carbon dioxide emitted from fossil fuels is an air pollutant within its scope. This amendment also provided tax incentives and grants to power companies and car companies to meet emissions standards, thereby empowering regulatory bodies to set more stringent standards.
By 2030, programs running under the Clean Air Act are projected to yield a net benefit of $2.5 to $5 trillion annually. Additionally, by 2030, these programs are expected to lower CO2 and methane emissions, avoiding $63 billion in climate-related economic damages each year.
Clean Water Act
The Clean Water Act is designed to protect the nation's water resources. It requires industries, including coal-fired power plants, to reduce pollutants released into the water. The Act sets effluent limitations guidelines and standards (ELGs) for specific industries, including the steam electric power generation industry. These guidelines are based on the performance of demonstrated wastewater treatment technologies and aim to achieve economically viable pollutant reductions.
In 2025, the U.S. Environmental Protection Agency (EPA) announced that it would reconsider the 2024 wastewater regulations for coal-burning power plants, aiming to balance affordable electricity with water resource protection. This move aligns with President Trump's "Unleashing American Energy" initiative.
Emissions Limits
Emissions limits refer to the regulatory standards imposed on various industries to curb the release of pollutants into the environment. In the context of coal power, emissions limits target the release of harmful substances such as sulfur dioxide, nitrogen oxides, particulates, carbon dioxide, mercury, and heavy metals.
To comply with these limits, the coal industry has employed several strategies. These include the use of flue gas desulfurization equipment ("scrubbers") to remove sulfur from smoke, the adoption of low-sulfur coal, and the development of more effective coal cleaning methods after mining. Additionally, research is underway to address CO2 emissions through carbon capture and storage technologies, as well as the reuse and recycling of waste produced from burning coal.
In summary, the Clean Air Act, Clean Water Act, and emissions limits have been crucial in driving the reduction of pollution from coal power and other industrial sources. These policy interventions have not only improved air and water quality but also yielded significant economic and public health benefits.
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Frequently asked questions
Coal power is the most polluting way to produce electricity. It releases massive amounts of pollution, contributing to climate change and intensifying it. It is linked with asthma, cancer, heart and lung ailments, neurological problems, acid rain, and global warming. Coal is responsible for about 40% of global greenhouse gas emissions from fossil fuel use.
Coal power is linked to a range of health problems, including higher rates of childhood asthma, heart and lung disease, and some cancers. It also emits toxic and carcinogenic substances into the air, water, and land, severely affecting the health of miners, workers, and surrounding communities. In China, 366,000 deaths were attributed to coal in 2013 alone. In the US, coal-related deaths amount to 50,000 per year.
Carbon capture and storage (CCS) technologies are emerging as a potential solution. CCS separates CO2 from other gases in the exhaust stream, compresses it, and injects it into deep geological formations for storage. However, CCS is expensive and has not yet been deployed at a commercial scale. Other methods include the use of scrubbers to clean sulfur from smoke and the development of technologies to remove impurities from coal or improve energy efficiency.
