(I) harmful substances.
(II) groundwater contamination.
(III) harvesting.
(IV) fish.
(V) major threat to health.
(VI) Sulfur dioxide.
(VII) storms.
(VIII) Greenhouse gases.
Q: You are presented with the quiz "what have a negative impact on the environment" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "landfills have a negative impact on the environment" and "landfill leachates and groundwater contamination". So, what's the best answer to the question?
A:
(II)