400
                                A factor that can harm abiotic factors such as the air, water, and soil. 
Hint: Oil spill and smog
What effect does this factor have on the environment?
                                What is pollution? 
It can contaminate the air, harming the animals that live there, it can contaminate the water or food supply, making the animals sick or even killing them, and it can sink into the soil, killing plants and hurting animals that live in or below the soil.