Acid rain A．immediately kills trees and affects aquatic life in lakes and rivers. B．deposits various metals iron, mercury, aluminum into the soil. C．kills forests by weakening them and reduces fish populations. D．releases sulfur dioxide, nitrogen oxide and into the atmospher
The author seems, in the last paragraph of this passage, A．to alarm us against the terrible effects of acid rain. B．to suggest that there are some ways to solve the problem. C．to urge us to pass alternative stricter laws on pollution. D．to remove the effects of acid rain from all around us.