Acid Rain

1.) List a few of the gases which lead to acid rain.
sulfur dioxide and nitrogen oxides 

2.) What is the source of much of the acid rain producing gases in Pennsylvania?
The source of most sulfur dioxide is high-sulfur coal burned in power plants

3.) Briefly explain how acid rain forms.
Acid rain forms when sulfur dioxide and nitrogen oxides in the atmosphere combine with water to form sulfuric acid and nitric acid, respectively. These acids, mixed with rainwater, fall to Earth as acid rain, snow or fog and can acidify lakes and streams in the Northeast.