| For the past 23 years, EPA has examined air pollution
trends of each of the six principal pollutants in this country. EPA examines
changes in air pollution levels over time and summarizes the current
air pollution status annually in two comprehensive technical documents
titled National Air Quality and Emissions Trends Report and National
Air Pollutant Emission Trends. The following sections summarize trends
in air quality and emissions during the last 10 years. |
Long-Term Emissions
Trends
Summary of Air Quality Emissions
Trends
Carbon Monoxide (CO)
Lead (Pb)
Nitrogen Dioxide (NO2)
Ozone (O3)
Particulate Matter (PM-10)
Sulfur Dioxide (SO2)
|
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