Question

what is the importance of green house gases present in the atmosphere.

Answer 1

This process is the fundamental cause of the greenhouse effect. The primarygreenhouse gases in Earth'satmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone. ... This increase has occurred despite the uptake of more than half of the emissions by various natural "sinks" involved in the carbon cycle.
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Answer 2

It helps in trapping heat released from Earth's atmosphere thus retaining the temperature