The greenhouse effect is
Aa natural phenomenon that allows heat to escape the atmosphere.
Ba natural phenomenon that helps to maintain Earth's temperature
Cthe result of the differences in the angle of the sun's rays.
Dan unnatural phenomenon that causes heat energy to be radiated back into the atmosphere.
Aa natural phenomenon that allows heat to escape the atmosphere.
Ba natural phenomenon that helps to maintain Earth's temperature
Cthe result of the differences in the angle of the sun's rays.
Dan unnatural phenomenon that causes heat energy to be radiated back into the atmosphere.