Question

this word refers to an abnormal increase in temperature of the earths atmosphere. carbon footprint greenhouse gas global warming climate change

Explanation:

Carbon footprint is about the amount of carbon - dioxide emissions. Greenhouse gas is a type of gas that contributes to the greenhouse effect. Climate change is a broader term including various long - term changes in climate. Global warming specifically refers to the abnormal increase in the earth's atmosphere temperature.

Answer:

C. global warming