The study of how humans impact the environment is

?

Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation.

Anthropocene

Explanation:

The atmospheric scientist Paul Crutzen introduced the term "Anthropocene" in the mid-1970s. The term is sometimes used in the context of pollution emissions that are produced from human activity since the start of the Agricultural Revolution but also applies broadly to all major human impacts on the environment.