How did contesting the science of acid rain benefit the reagan administration?

Ronald Reagan, who achieved the unity of the entire liberal American left, thought very little about the environment, in political terms, and did not fear that his popularity would be damaged by his decisions; so Reagan dismissed the problem of acid rain and the ideas to end it. During the 1980s, pollution was a major problem in Canada, and Prime Minister Pierre Trudeau blamed US factories for pollution, so the Environmental Protection Agency asked Reagan to commit more budget to reduce acid rain; but Reagan rejected it, saying it would waste government money, and even questioned all scientific evidence about the causes of acid rain.