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Our Nation's Air - Status and Trends through 2008. The good news?
"Cleaner cars, industries, and consumer products have contributed to cleaner air for much of the U.S. • Since 1990, nationwide air quality has improved significantly for the six common air pollutants. These six pollutants are ground-level ozone, particle pollution (PM2.5 and PM10), lead, nitrogen dioxide (NO2), carbon monoxide (CO), and sulfur dioxide (SO2). Nationally, air pollution was lower in 2008 than in 1990 for: – 8-hour ozone, by 14 percent, annual PM2.5 (since 2000), by 19 percent, PM10 , by 31 percent, Lead, by 78 percent, NO2 , by 35 percent, 8-hour CO, by 68 percent, and annual SO2 , by 59 percent."
Source: Our Nation's Air - Status and Trends through 2008. The good news? "Cleaner cars, industries, and consumer products have contributed to cleaner air for much of the U.S. • Since 1990, nationwide air quality has improved significantly for the six common air pollutants. These six pollutants are ground-level ozone, particle pollution (PM2.5 and PM10), lead, nitrogen dioxide (NO2), carbon monoxide (CO), and sulfur dioxide (SO2). Nationally, air pollution was lower in 2008 than in 1990 for: – 8-hour ozone, by 14 percent, annual PM2.5 (since 2000), by 19 percent, PM10 , by 31 percent, Lead, by 78 percent, NO2 , by 35 percent, 8-hour CO, by 68 percent, and annual SO2 , by 59 percent."
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