SSC
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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By which mechanism do greenhouse gases contribute to global warming?
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They absorb higher amounts of short wave radiation caused by increased combustion of fossilized organic matter.
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Their higher concentration absorbs more long wave radiation coming from the Sun.
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Short wave radiation emitted from the Earth’s surface increases with their concentration.
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They absorb higher amounts of long wave radiation emitted from the Earth’s surface as their concentration increases.
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Explanation:
Detailed explanation-1: -III. Much of this infrared radiation does not reach space, however, because it is absorbed by greenhouse gases in atmosphere, and is then emitted as infrared radiation back toward the Earth’s surface. This process is known as the greenhouse effect.
Detailed explanation-2: -Greenhouse gases in the atmosphere (such as water vapor and carbon dioxide) absorb most of the Earth’s emitted longwave infrared radiation, which heats the lower atmosphere.
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