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What is the simple meaning of global warming?

Answer and explanation

Correct answer: Rise in Earth's average temperature

The correct answer is A: a rise in Earth’s average temperature. Global warming means a long-term increase in the average temperature of Earth’s surface and lower atmosphere. Human activities such as burning coal, oil and gas and changing land use increase heat-trapping greenhouse gases, including carbon dioxide and methane. These gases make it harder for some outgoing heat to escape. B is wrong because global warming does not mean Earth becomes physically smaller. C is wrong because warming does not make rain stop everywhere. D is wrong because the length of a day does not permanently become shorter for this reason. Local weather can vary, but global warming concerns a long-term global average. Memory cue: global warming is about average heat, not one day’s weather.

Related tags

Global WarmingGreenhouse GasesClimate ChangeGreen SkillsEmployability SkillsArtificial IntelligenceClass 12 Mcq

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