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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.
Many political activists use the term global warming to refer to anthropogenic global warming theory (AGW), which asserts that human activity such as spewing greenhouse gases is causing an increase in temperature and is more significant than natural causes and cycles.