The natural greenhouse effect is crucial in maintaining the proper temperature for life on Earth. Thus,

Options

A. withour it, earth would be permanently covered with ice
B. increase in `CO_(2)` content , increase global warming
C. both (a) and (b) are correct
D. None of these

Answer

C

Explanation

Greenhouse effect occurring naturally makes termperature control of the atmosphere.
If it is absent, there is no warming hence, no vaporization of `H_(2)O_(l)`. Temperture will be lowered, thus only ice appers.
`H_(2)O(g) hArr H_(2)O_((l))hArr H_(2)O(s)`
`Delta G lt 0`
If `CO_(2)` content increases. more `IR` raditation are absorbed and warning takes place.