What are some jobs that are bad to the enviroments surrounding it? What do they do that is bad?

Question

I am not sure if cutting down trees is good, because some left the tree at the middle so it could keep on growing

Example: Coal burning, it makes the air bad.

Answer 1

Toll booth operator - causes traffic congestion, which wastes fuel

Answer 2

yes. coal is bad for the air. but the real thing is. when earth first started their was no snow to begin with. we need the trees though for our air supply. and the trees let most of the animals survive because that is their natural enviroment.