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Definition of Global Warming: A gradual increase in the earthâs average surface temperature. Technical term for this: Anthropogenic global warming. Definition of Greenhouse Gas: A gas, like CO2, which traps the sunâs heat.
Global warming means the recent (200 year) rise in the earth's  temperature caused by man's deforestation and burning of fossil  fuels (coal, oil and natural gas) since the â¦ Industrial Revolution.    Global temperature has risen 0.8Â° C since 1900, and 0.6 degrees  since the 1970s.