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Key words ­ Atmosphere ­

Ozone ­ triatomic oxygen

Chemoautotroph ­ an organism that gains its metabolic energy using energy from chemical
reactions e.g. nitrifying bacteria in the nitrogen cycle.

Stratosphere ­ the later of the atmosphere that absorbs UV and contains the ozone layer. It is
above the troposphere…

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Kyoto Protocol ­ the international agreement intended to control emissions of greenhouse

HFCs ­ hydrofluorocarbons are a group of chemicals used to replace CFCs.

HCFCs ­ hydrochlorofluorocarbons are a group of chemical used to replace CFCs.

MEDCs ­ more economically developed countries.

LEDCs ­ less economically developed countries.



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