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| That contains a high concentation of acids, often because of the pollution of the atmosphere |
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| A type of hydrocarbon in which some or all of the hyrogen atoms are replaced by chlorine and flourine; used in coolants for refridgerators and air conditioners and in cleaning solevents |
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| The warming of the surface and lower atmosphere of Earth that occurs when carbon dioxide, water vapor, and other gases in the air absorb and reradiate infrared radiation |
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| The effect of too much heat being kept in by the planet's atmosphere |
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| Species that are slowing dieing off; from either habitat deprivation or hunting. |
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| The act of destroy a certain species or others natural home |
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| The layer of atmosphere at an altitude of 15 to 40 km in which ozone absobs ultraviolet solar radiation |
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| A species of plant or animal that isn't part of the Habitat |
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| The variety of organisms considered at all levels, from populations to ecosystems |
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| A species where there only a few left in the world |
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| A species that colonizes an uninhabited area and that starts an ecological cycle in which many other species become established |
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| unidirectional change in the composition of an ecosystem as the available competing organisms and especially the plants respond to and modify the environment |
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| succession that begins in an area that previously did not support life |
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| The condition of drug addiction in which greater amounts of a drug are neede to achieve the desired affect |
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| The process by which one community replaces another community that has been partialy or totally destroyed |
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| A community that, after a process of ecological sucession, has reached a general stable state |
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