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School buses and cars in traffic with exhaust visibly escaping their vehicles
Hazard

Air Quality

Air quality reflects the abundance of pollution present in air. Pollution is a mix of hazardous substances from both human-made and natural sources. Primary sources of human-made air pollution include vehicle emissions, fuel oils and natural gas to heat homes, by-products of manufacturing and power generation—particularly coal-fueled power plants—and fumes from chemical production.

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  •   The Milwaukee Skyline in Smog, by Jeramey Jannene, via Flickr. Used via Creative Commons License CC BY 2.0.

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    USFWS National Fish, Wildlife, and Plants Climate Adaptation Strategy
  • Cover credits: Children in woods, Steve Hillebrand. Horse-eye jacks, National Oceanic and Atmospheric Administration. Painted Hills, Jane Pellicciotto. Pelican, George Andrejko/ Arizona Game and Fish Department