Answer:air pollution
Explanation:
Air Pollution is the presence in to the air of a substance which has harmful or poisonous effects
I think it would be all natural constituents or either natural environment.
The theory of continental drift suggests that all the land masses on earth were once part of one supercontinent. Plate tectonics is the ability to measure the movement of land masses.
X=2
Do you want a reason why I got what I did?