Air Pollution in Maryland

Maryland

Air pollution was responsible for 6.7 million untimely deaths worldwide in 2019. In the United States, fine particle air pollution originating from human activity was responsible for an estimated 107,000 premature deaths in 2011, with an associated cost of $886 billion to society. 

Large particulate matter with a diameter of 10 microns or less (PM₁₀) can cause eye, nose and throat irritation or discomfort when inhaled, while small, fine pollutants (PM_2.5) from sources such as auto exhaust, power plants and wildfire smoke can penetrate deep into lung tissue and enter the bloodstream. Exposure to fine particle air pollution has been linked to heart and lung problems, including decreased lung function, asthma, irregular heartbeat and heart attack.

The environment is also affected by air pollution, as particles are carried from one area to another. Examples include increasing acidification in lakes and streams and changing nutrient patterns in soil. Additionally, recent increases in wildfires are causing significant health problems. Researchers have found that wildfire-specific PM_2.5 may be more harmful than other types of air pollutants.

Populations that are more susceptible to health risks from air pollution include: 

• Individuals with preexisting heart and respiratory conditions.
• Older adults.
• Children and infants.
• Pregnant women. 

The following populations, meanwhile, are more likely to be exposed to air pollution:

• Those living in low-income communities.
• Individuals living in urban areas compared with those living in rural areas. 
• Black, Asian and Hispanic populations compared with white and Native American populations.

The health and environmental benefits of lower air pollution are significant. Studies have shown that decreasing the concentration of fine particulates in the air leads to lower risk of all-cause mortality, lung cancer and death from cardiovascular disease. The Environmental Protection Agency (EPA) estimates that the Clean Air Act prevented an estimated 200,000 heart attacks, 2.4 million asthma attacks and 17 million lost workdays in 2020. 

Policies that reduce oil and gas emissions have significant health benefits. The EPA recently proposed amendments to the Clean Air Act that would save an estimated $4.5 billion a year and reduce toxic air pollutants by 480,000 tons. The proposed rule requires states to develop their own plans to reduce methane emissions from existing oil and gas sources with the involvement of the communities most impacted by air pollution. This will help protect overburdened communities that live near air pollution sources, such as factories and major roadways. 

Individuals can reduce their contribution to air pollution by decreasing fossil fuel consumption or taking part in local energy conservation programs. Individuals can try to limit their exposure to air pollution by:

• Monitoring local air quality at www.AirNow.gov and staying indoors as much as possible on days with poor air quality. 
• Avoiding long periods of strenuous exercise near busy streets and on days with poor air quality.
• Using an air purifier in your home or office space to filter out particles from the outdoors.

Healthy People 2030 has multiple objectives focused on promoting healthier environments, including: 

• Reducing the number of days people are exposed to unhealthy air. 
• Reducing toxic airborne emissions.
• Increasing the use of public transportation among commuters.

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