the contamination of the atmosphere by the introduction of pollutants from human and natural resources

pollutant emitted directly from a source

pollutant not directly emitted, but forms when other pollutants react in the atmosphere

fog or haze combined with smoke and other atmospheric pollutants that make it really hard to breath

the activity or job of protecting and being responsible for something

a gas that contributes to the greenhouse effect by absorbing infrared radiation, e.g., carbon dioxide and chlorofluorocarbons.

a gradual increase in average global temperature typically caused by the greenhouse effect

agency of the United States federal government whose mission is to protect human and environmental health.

index for reporting daily air quality that tells you how clean or polluted your air is, and what associated health effects might be a concern for you.