Fact 1: Acid rain has a negative impact on water quality. Fact 2: Sulfur dioxide causes acid rain. Given the two facts above, water quality can be negatively effected by what? ?

Choose from:
I. flooding;
II. Pesticides;
III. erosion;
IV. contamination;
V. competition;
VI. Pollution;
VII. sulfur dioxide;
VIII. deforestation;
The answer is:
VII.