Windows to the Universe: Earth’s Atmosphere

From site:  Warm near the equator and cold at the poles, our planet is able to support a variety of living things because of its diverse regional climates. The average of all these regions makes up Earth’s global climate.

Earth’s global climate is warming as natural processes like the greenhouse effect are influenced by changes caused by humans.

Climate has cooled and warmed throughout Earth history for various reasons. Yet, rapid warming like we see today is unusual in the history of our planet.