Question

The heating of the atmosphere due to an increase in `CO_2` is typically called what?

Answer 1

Global warming.

Explanation:

Global warming is not to be confused with the greenhouse effect. The greenhouse effect is small amounts of greenhouse gases (including CO2) that trap enough outgoing radiation that keeps the planet conducive for life. However, when too many greenhouse gases accumulate in the atmosphere (like what is happening now by humans burning fossil fuels), the natural greenhouse effect can easily tip into a global warming event.