Look at the graphs. Select one pattern/result that interests you. Propose a hypothesis to explain the pattern and propose that below: For example, you might observe a decline in the number of species over time. Maybe there are fewer species at 9 months than you found at 3 months. What could have led to this decline

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.