| greenhouse | A house in which tender plants are cultivated and sheltered from the weather. Source: Websters Dictionary (01 Mar 1998) |
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| greenhouse effect | The effect of certain gases in the Earth's atmosphere in trapping heat from the sun. (05 Dec 1998) |
| greenhouse gases | Gases that trap the heat of the sun in the Earth's atmosphere, producing the greenhouse effect. The two major greenhouse gases are water vapour and carbon dioxide. Other greenhouse gases include methane, ozone, chlorofluorocarbons, and nitrous oxide. (05 Dec 1998) |