30. Which gas emitted by power stations causes acid rain? A.Carbon dioxide B.Sulphur dioxide C.Helium D.Nitrogen
Answer: Option B Solution: Power plants release the majority of sulphur dioxide and much of the nitrogen oxides when they burn fossil fuels, such as coal, to produce electricity. In addition, the exhaust from cars, trucks, and buses releases nitrogen oxides and sulfur dioxide into the air. These pollutants cause acid rain.
