What are the negative impact on the environment?

Like Deforestation, Pollution, Global Warming and Greenhouse Effect and Man-made materials...EXP: Sand ----> Heated ----> Made into glass and silicon chips used in computers
The negative human impact on the environment is us treating the environment for example littering

what bad things we do on the environment and how it affects it

In simplest form:

How are we hurting our surroundings