Extinetion is a naturally occurring phenomenon that has occurred on earth, since life began. Scientists are so concerned about extinction now because

_________ is a naturally occurring phenomenon that is responsible for the heating of the Earth's surface and atmosphere

The greenhouse effect is a naturally occurring phenomenon that is responsible for heating of earth’s surface and atmosphere. Without greenhouse effect the average temperature at surface of earth would have been

Greenhouse effect is a naturally occuring phenomenon that it responsible for heating of earth's surface and atmosphere. a. Explain greenhouse effect . b. What will happen if there is absolutely no greehouse effect over earth's surface ?