Greenhouse gases are known so as:
[amp_mcq option1=”they trap heat in the high altitudes.” option2=”they act like a greenhouse on the surface of the planet.” option3=”the colour of some of the gases emanating from industrial plants are green.” option4=”these gases are produced by agricultural crops.” correct=”option2″]
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UPSC Geoscientist – 2020
– The Earth’s surface absorbs this radiation and re-emits energy as infrared radiation (longwave heat).
– Greenhouse gases absorb this outgoing infrared radiation and re-emit it in all directions, including back towards the Earth’s surface, thus trapping heat and warming the planet.
– An increase in the concentration of greenhouse gases due to human activities enhances this effect, leading to global warming and climate change.
– The analogy with a greenhouse is not perfect (a real greenhouse also traps heat by preventing convective heat loss), but it effectively describes the trapping of infrared radiation.