It reduces the demand of electricity because if people want to decrease the amount of air pollution they would stop using things that would cause pollution for example, people stopping to use gasoline powered cars and use electric cars more, therefore the demand for electricity will go low since lesser people will be using it.
The extinction of a species due to an ice age
This would have to do with aerobic and anerobic respiration
Protects humans from the harmful UV rays of the sun
