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Chapter 13 Envrironment Unit Definitions
Terms to know
12
Bartending
11th Grade
11/04/2010

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Term
Deforestation
Definition
the process of destroying a forest and replacing it with something else
Term
Global Warming
Definition
the observed and projected increase in the earth’s average temperature due to burning of fossil fuels and deforestation
Term
Acid Precipitation
Definition
any form of precipitation that is high in sulfuric and nitric acids as a result of pollution in the air
Term
CO2 Emissions
Definition
Carbon dioxide emissions caused by burning of fossil fuels; largest contributor to global warming
Term
Ground Water
Definition
water beneath Earth’s surface in underground streams and other forms
Term
aquifer
Definition
an underground layer of rock, gravel, etc., from which water can be drawn for wells and which is a source of springs
Term
Greenhouse Gasses (GHG's)
Definition
various gases in the atmosphere that absorb and emit radiation, including carbon dioxide, methane, nitrous oxide, and zone
Term
Ultra Violet Radiation
Definition
invisible rays from the sun that can cause skin cancer
Term
Ozone Layer
Definition
a thin layer of ozone in the atmosphere 15 to 30 kilometres above Earth; the ozone layer filters the sun’s ultraviolet (UV) rays
Term
CFC's (chlorofluorocarbons)
Definition
chemicals used in coolants, solvents, and aerosol cans that damage the ozone layer
Term
Montréal Protocol
Definition
an international agreement signed in 1987 to phase out the ozone-depleting chemicals CFCs
Term
Kyoto Protocol
Definition
an international agreement that sets binding targets for reducing greenhouse gas emissions; the average target is 5 percent of 1990 levels by 2008–2012
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