12) Why is the natural greenhouse effect of Earth a cause for concern now?
t
3
A)
Greenhouse gases act as natural insulators and prevent the heat
of the Sun from reaching Earth.
B)
Greenhouse gases destroy the ozone layer, which acts as natural
insulation against ultraviolet radiation from the Sun.
The rise in the amount of greenhouse gases has resulted in
global warming, because more heat gets trapped in the
atmosphere.
C)
D)
The rise in the amount of greenhouse gases has reduced the
amount of oxygen in the air, decreasing the breathable air on
Earth.