A) less than the present level
B) same as the present level
C) dependent on the oxygen content in the atmosphere
D) more than the present level.
Correct Answer: A
Solution :
: \[C{{O}_{2}}\] is a greenhouse gas i.e., it traps a substantial amount of long-wave infrared radiation emitted back by earths surface and do not let it leave the earths atmosphere. It causes increased temperature. Hence, in the absence of \[C{{O}_{2}}\] in our atmosphere, temperature of earths surface would have been less than the present level.
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