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Environmental issues [electronic resource] : essential primary sources by 
The Gale encyclopedia of environmental health [electronic resource] by Specific articles in Gale e-books:
Air Pollution – Air pollution is the presence of high concentrations of harmful gases and particles in the air.
Air Pollution: Urban, Industrial, and Transborder -- Air pollution is the contamination of air with substances known as pollutants that are harmful to the health of humans, animals, or plants, or which damage property.
Indoor Air Quality -- IAQ is the condition and content of interior air, especially with regards to how it affects health and safety of humans.
Environmental Policy by 
The Weather Makers by 
Air Quality by 
Atmosphere by 
Climate by 