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Aura Science

OMI NO2 trends: 2007 - 2005 annual means

Nitrogen dioxide (NO2) is an Environmental Protection Agency (EPA) criteria pollutant. It contributes to the formation of ground-level ozone. Anthropogenic sources of NO2 include power plants and transportation. The identification of humans as the main driver of global warming helps us understand how and why our climate is changing, and it clearly defines the problem as one that is within our power to address.

2005 Weekdays

Decreases in US due to greater controls on car and power plant NOx emissions

2008 Weekdays

Increases in Asia due to increased emissions (power plants and transportation)