Environment Database
The environment database and a glossary about facts, terms and descriptions

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Glossary A

The Environmental Glossary. Letter A +++ Popular Articles: 'Active solar heating system', 'Atmosphere', 'Alaska'

Allowance

An allowance is a tradeable permit to emit a specific amount of a pollutant. For example, under the Acid Rain Program, one allowance permits the Emissions of one ton of sulfur dioxide

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Alluvial

An Alluvial is Relating to and/or sand deposited by flowing water.

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Alluvium

An alluvium is deposits of clay, silt, sand, gravel, or other particulate material that has been deposited by a stream or other body of running water in a streambed, on a Flood plain,

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Aloe Vera

Deutsch: Aloe Vera / Español: sábila / Português: babosa / Français: aloès / Italiano: aloe vera

Aloe vera is a succulent plant species well known for its medicinal properties, but in the environmental context, it plays a significant role in sustainable land use, erosion prevention, water conservation, and biodiversity support, especially in arid and semi-arid regions.

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Alpha particle

An Alpha particle consists of two neutrons and two protons bound as a single particle that is emitted from the nucleus of certain radioactive isotopes in the process of decay.

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Alternate Method

An Alternate Method is any method of sampling and analyzing for an air or water Pollutant that is not a reference or equivalent method but that has been demonstrated in specific cases

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Alternative Compliance

An Alternative Compliance is a policy that allows facilities to choose among methods for achieving emission-reduction or risk -reduction instead of command-and control regulations that

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Alternative energy

An alternative energy is Energy that is not popularly used and is usually environmentally sound, such as solar or wind Energy (as opposed to fossil fuels).

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Alternative fibers

alternative fibers are fibers produced from non-wood sources for use in paper making.

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Alternative Fuels

Alternative Fuels are Substitutes for traditional liquid, oil-derived Motor vehicle fuels like gasoline and diesel.

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