Fact 1: Pollutants have a negative impact on the environment. Fact 2: Cars are heavy polluters of the environment. Given the two facts above, what has a negative impact on the environment?

Possible answers:
I. Acids.
II. bikes.
III. cars.
IV. birds.
V. mines.
VI. skates.
VII. wind.
VIII. guns.
Answer:
III.