Sentences with phrase «amendment on acid rain»

In 1990, President Bush signed a Clean Air Act amendment on acid rain, and, two years later, he signed a global - warming treaty at a United Nations meeting in Rio de Janeiro.

Not exact matches

Cap and trade was first used to remove lead from gasoline and then worked into amendments to the Clean Air Act in 1990 to force power plants to cut back on sulfur dioxide, one of the chemicals that produce acid rain.

By the mid-1990s, acid rain research focused on how well the Clean Air Act Amendments were working.