Question

How do greenhouse gases bring about global warming?

A. they trap heat waves given off by the sun.
B. they allow solar radiation to reach the earth's surface.
C. they heat the surface of the earth as they become heated by the sun.
D. they create holes in the atmosphere, allowing in more ultraviolet radiation.

Answer 1

a)

Step-by-step explanation:

Greenhouse absorb the sun's heat that radiates from the Earth's surface, trap it in the atmosphere and prevent it from escaping into space. The greenhouse effect keeps the Earth's temperature warmer than it would otherwise be, supporting life on Earth.