Question

what os greenhouse effect

Answer 1

The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere. If a planet's atmosphere contains radiatively active gases they will radiate energy in all directions. 
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Answer 2

Answer:

Explanation:

Greenhouse effect is a naturally occurring phenomenon that is responsible for heating of earth's surface and atmosphere due to the presence of certain gases in the atmosphere. In the absence of Earth would have been a chilly -18°C rather than the present average of 15°C.