Question

the recent rise in earths average surface temperature is known as

a nitrogen fixation

b an ice age

c global warming

d none of the above

Explanation:

Global warming refers to the long - term increase in Earth's average surface temperature. Nitrogen fixation is the process of converting nitrogen gas into a usable form for plants. An ice age is a period of long - term reduction in the Earth's temperature.

Answer:

C. global warming