Environment
Air
South Coast Air Quality Management District: Daily air quality updates,historical data.
AIRNow: Cross-agency U.S. Gov't site;air quality map, hourly smog levels, forecast…
General
Atlas of the Environment: Maps and text about the population-environment relationship.
Green InfoLine: Peer-reviewed full text articles about the environment,free.
Planet Ark: Resources and guides for reducing impact on our planet.
Plastic recycling: Symbols and explanations.
Terms of Environment:EPA; glossary, abbreviations and acronyms.
World Biomes: Maps, images, news about regions distinguished by climate, fauna and flora.
Water
The World's Water: Information and resources about global freshwater.