Brian Barton
Air pollution is a pressing issue for national parks, with 96-97% suffering from significant air pollution problems. Haze pollution, caused by tiny particles and gases in the air, affects 89-98% of parks, obscuring scenic views and causing health issues for visitors, staff, and nearby communities. Ozone pollution, which is linked to adverse health outcomes, is also prevalent, with 96% of parks facing levels that negatively impact human health. Climate change is another concern, with 80% of parks facing heightened threats from wildfires, droughts, sea level rises, and invasive species. These issues are caused by fossil fuel extraction and burning, industrial facilities, transportation, and power plants, with pollution travelling hundreds of miles to affect even remote parks. While legislation like the Clean Air Act has helped reduce pollution, recent policy changes have contributed to a rise in air pollution, endangering the health of people, plants, animals, and ecosystems in national parks.
| Characteristics | Values |
|---|---|
| Percentage of national parks with air pollution problems | 96-97% |
| Percentage of national parks with air that is unhealthy to breathe at times | 85% |
| Percentage of national parks with haze pollution | 89-98% |
| Percentage of national parks with soils and waters affected by air pollution | 88% |
| Percentage of national parks facing heightened threats from climate change | 57% |
| Average distance of obscured scenic views in national parks due to haze pollution | 50 miles |
| Number of park-polluting coal plants closed | 150+ |
| Tons of visibility-impairing pollution reduced | 1.4 million |
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Haze pollution
According to the National Parks Conservation Association (NPCA), 98% of national parks suffer from concerning levels of haze pollution, obscuring scenic views and landmarks. This means that park visitors miss out on an average of 50 miles of scenery, which is a significant distance. Haze pollution also has economic implications, as it discourages visitation to national parks, impacting the local economies that depend on park-related tourism.
The NPCA has been actively working to address haze pollution and protect national parks. Their efforts include raising awareness, holding states and polluters accountable, advocating for stronger air quality standards, and engaging park advocates. The NPCA has also been successful in reducing visibility-impairing pollution, closing down over 150 park-polluting coal plants, and eliminating a significant amount of climate pollution. These actions demonstrate a commitment to preserving the air quality and natural beauty of national parks.
While progress has been made, the issue of haze pollution in national parks remains a pressing concern. It requires continued advocacy, stricter regulations, and collaboration between state and federal agencies to ensure the protection of these precious natural areas and the health and well-being of visitors and nearby communities. With ongoing efforts, we can strive for cleaner air and a healthier climate, allowing current and future generations to enjoy the awe-inspiring views and pristine environments that national parks offer.
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Climate change
The Clean Air Act has helped reduce pollution over the past five decades, but more recent policies have contributed to a reversal of this trend. Air pollution is on the rise, and the climate crisis is accelerating. According to the National Parks Conservation Association (NPCA), 96-97% of US national parks suffer from significant harm from air pollution. This includes haze pollution, which obscures scenic views, and ozone pollution, which negatively affects human health and vegetation.
The NPCA's Clean Air Team works to strengthen clean air and climate laws and regulations, hold polluters accountable, and engage park advocates. Their efforts have resulted in the reduction of 1.4 million tons of visibility-impairing pollution, the closure of over 150 park-polluting coal plants, and the elimination of 171 million metric tons of climate pollution. The Environmental Protection Agency has also strengthened its air quality standards, providing additional protection for national parks.
Despite these efforts, climate change and air pollution continue to pose alarming challenges to national parks. Unique species, such as the endangered Florida panther, are at risk, and the health of plants, animals, and ecosystems is weakened. Visitors to national parks also face health risks due to poor air quality. It is essential to act now to ensure that national parks can thrive for future generations.
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Air pollution sources
Air pollution in national parks can be caused by a variety of sources, both near and far. One significant source is industrial facilities and power plants located near park boundaries. For example, polluting industrial facilities across Kentucky and the surrounding regions threaten the biodiversity, vistas, and visitors' health of Mammoth Cave National Park. Similarly, haze pollution in Guadalupe Mountains National Park can be attributed to faraway coal plants and nearby oil and gas operations.
Another source of air pollution in national parks is vehicle emissions. This includes cars, trucks, and other vehicles travelling to and from the parks, as well as those operating within the parks, such as maintenance or tour vehicles.
The burning of fossil fuels, including oil, gas, and coal, is also a major contributor to air pollution in national parks. This pollution can travel hundreds of miles, affecting even the most remote parks and communities. The extraction and processing of fossil fuels can also release pollutants into the air, which then spread to nearby parks.
Additionally, climate change-induced events such as wildfires, droughts, and sea level rise have been identified as significant contributors to air pollution in national parks. These events can release large amounts of smoke, dust, and other pollutants into the air, reducing air quality and harming the health of visitors and staff.
It is worth noting that natural sources can also contribute to air pollution in national parks. For example, volcanic activity can release gases and particles into the atmosphere, affecting the air quality in and around volcanic national parks.
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Health risks
Air pollution is one of the most serious threats to national parks, their visitors, and the health of the surrounding communities. A report by the National Parks Conservation Association (NPCA) found that 85% of US national parks had air that was unhealthy to breathe at times, with 88% of parks suffering from air pollution that was harmful to nature and 89% from haze pollution. The latest report from 2024 shows that these figures have increased, with 98% of the 399 national parks assessed suffering from haze pollution, and 96% facing ozone pollution that negatively affects human health.
Ozone is one of the most widespread pollutants in parks, caused by volatile organic compounds reacting in sunlight with pollution from cars and industries. It inflames and irritates the lungs, making it harder to breathe, and those with asthma or other respiratory illnesses are especially at risk. It can cause asthma attacks, tightness in the chest, and throat and airway irritation. Ozone pollution also harms plants, stifling the growth of trees and plants, and damaging leaves.
Haze pollution, which consists of tiny particles and gases in the air, reduces visibility and affects the incredible views that national parks are known for. It is caused by pollutants such as sulfur dioxide and ozone, which are linked to respiratory issues, heart attacks, and premature death in people with heart or lung disease. According to the NPCA, haze pollution can decrease visibility in Big Bend National Park in Texas by up to 70% on certain days.
The sources of air pollution impacting national parks include nearby industrial facilities, oil and gas drilling sites, coal mines, power plants, vehicles, and agricultural activities. These sources not only affect the air quality but also contaminate water sources, causing changes to soil and water chemistry, which further impacts the health of both the environment and humans.
The health risks associated with air pollution in national parks highlight the urgent need for action to protect the parks, their visitors, and surrounding communities. Efforts such as implementing stronger air quality standards, improving air monitoring, and advocating for climate-friendly policies are crucial to safeguard the health and wellbeing of all those who enjoy and depend on these natural treasures.
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Clean Air Act
Air pollution is a significant issue for national parks in the United States, with 96-97% suffering from significant air pollution problems. This pollution travels from hundreds of miles away, affecting even the most remote parks and surrounding communities. The Clean Air Act, passed in 1970, gives the National Park Service (NPS) the tools and legal responsibility to protect air quality and sensitive resources in national parks.
The Act was significantly amended in 1977 and 1990 to address the issue of air pollution in national parks. The 1977 amendments added specific goals for areas with "clean" and "dirty" air. The Clean Air Act set up the Prevent Significant Deterioration (PSD) program to limit air pollution from new sources for the benefit of national parks and other special areas. These protections apply to national parks larger than 6,000 acres and national wilderness areas larger than 5,000 acres, designated as “Class I” areas. All other areas are classified as "Class II". The NPS manages 48 Class I areas.
The Clean Air Act also established a national goal to prevent and remedy existing visibility impairments in Class I areas. It requires that "reasonable further progress" be made toward attaining national air quality standards in "dirty" or nonattainment areas. States are primarily responsible for meeting these goals and use the State Implementation Plan (SIP) process to implement and enforce them. SIPs describe the steps that will be taken to improve air quality, including specific emission limitations, transportation controls, and economic incentives for reducing pollution.
The Clean Air Act provides a framework for federal land managers, including the NPS, to have a role in decisions related to new sources of air pollution and pollution control programs. It also requires the Environmental Protection Agency to set air quality standards. The Act's regulatory actions, such as national ambient air quality standards, control technology requirements, and state implementation measures, can significantly affect park air quality. The NPS is required by the Clean Air Act to prevent the significant deterioration of air quality in places of special natural, recreational, scenic, or historic value, which includes all national park units.
The Clean Air Act has helped reduce pollution over the past five decades. However, recent policy changes have contributed to a reversal of this trend, and air pollution is once again on the rise. The Clean Air Act continues to play a crucial role in protecting the air quality and sensitive resources in national parks, ensuring that Americans can enjoy clean air and healthy ecosystems in these treasured spaces.
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Frequently asked questions
96-97% of US national parks suffer from significant or unsatisfactory levels of harm from air pollution.
Pollution in national parks can come from industrial facilities near park boundaries, or travel from afar via air currents. Most air pollution does not originate in national parks, but it can travel hundreds of miles from its source. Much of this pollution comes from extracting fossil fuels like oil, gas, and coal, and burning them in power plants and vehicles.
Air pollution in national parks ruins scenic views, harms wildlife and historic sites, and affects the health of visitors and staff. Haze pollution obscures views, while ozone pollution is linked to numerous adverse human health outcomes, particularly during physical activity.
