AP BIOLOGY

Detailed explanation-1: -Around the world, agriculture is the leading cause of water degradation. In the United States, agricultural pollution is the top source of contamination in rivers and streams, the second-biggest source in wetlands, and the third main source in lakes.

Detailed explanation-2: -Groundwater is the most abundant source of freshwater available to humans, despite being largely unseen. Groundwater makes up less than 1% of the water on earth. The volume of groundwater is more than 30 times that of all the surface water sources like lakes, rivers, and streams combined!

Detailed explanation-3: -The leading sources of water pollution are agriculture, industries, and mining.

Detailed explanation-4: –Acids and bases lower the pH of freshwater.-Acids lower the pH of freshwater and bases raise the pH of freshwater.