Geologists working for the Environmental Protection Agency monitor surface waters at sites across the country to determine the effects of acid rain on aquatic ecosystems. What type of information would the geologists most likely track? A; human activity B; pH Levels C;Gas Emissions D; Climate Patterns

Acid rain refers to precipitation that contains an elevated level of hydrogen ions. It has harmful effects on plants, aquatic animals, buildings and sculpture.

Acid rain alters the pH of surface waters leading to a sudden increase in acidity. This negatively affects organisms with low tolerance for the sudden upward surge in H^+ concentration.

If the geologists are to study surface waters in order to determine the effects of acid rain, then they have to study the pH of the water.