AIRNow: Government website on air quality conditions.

Los Angeles River Revitalization: City site on LA river revitalization plan.

Southern California Earthquake Data Center: Up-to-date info and historical data on local earthquakes and faults.

Environmental Terms: Glossary of environmental terms and acronyms from the EPA.

World Biomes: Maps, images, and data on "biomes"—regions distinguished by their climate, fauna and flora.

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