This Environment Canada site on the question of Acid Rain looks at issues such as water, forest, air quality and health. A good source of information that looks at many different aspects of the question. A Map showing pH reading of the US in 1998. This site is a map of the United States. It shows the pH of 190 places and gives the student a visual indicator of areas that receive acid rain.
Students have to do research and become knowledgeable about acid rain before the meeting.
You might want to try some of these ideas with your class while they are preparing to collect their data. Acid rain is a serious environmental problem that affects large parts of the US and Canada. This section of the Web site provides information about acid rain's causes and effects, how we measure acid rain, and what is being done to solve the problem. The U.S. Environmental Protection Agency site on Acid Rain. A page of information submitted by a student of Dallas County Community College who did a special Independent Study Project with Web sources as the bibliographic references.