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Natural environment
Related to any physical feature of the earth's natural environment.
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Natural environment > Water 
estimated environmental concentration
Natural environment; Water
The estimated pesticide concentration in an ecosystem.
ethanol
Natural environment; Water
An alternative automotive fuel derived from grain and corn; usually blended with gasoline to form gasohol.
exceedance
Natural environment; Water
Violation of the pollutant levels permitted by environmental protection standards.
exclusion
Natural environment; Water
In the asbestos program, one of several situations that permit a Local Education Agency (LEA) to delete one or more of the items required by the Asbestos Hazard Emergency Response ...
exclusionary ordinance
Natural environment; Water
Zoning that excludes classes of persons or businesses from a particular neighborhood or area.
exempt solvent
Natural environment; Water
Specific organic compounds not subject to requirements of regulation because they are deemed by EPA to be of negligible photochemical reactivity.
exempted aquifer
Natural environment; Water
Underground bodies of water defined in the Underground Injection Control program as aquifers that are potential sources of drinking water though not being used as such, and thus ...
Sub-categories
- Air (43)
- Atmosphere (59)
- Climate (1147)
- Climate change (10457)
- Coral reefs (23903)
- Deserts (738)
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- Flood (34)
- Forests (37)
- Grassland (35)
- Land mass (144)
- Landslide (66)
- Mountains (203)
- Plateau (39)
- Speleology (1857)
- Volcano (5852)
- Water (18527)