GEOLOGY

Detailed explanation-1: -However, during heavy, prolonged rains, the amount of stormwater entering a combined sewer system can be overwhelming for the pipes and the treatment plant. This can lead to combined sewer overflows, or CSOs, which pollute rivers and streams to which they flow.

Detailed explanation-2: -Overflow during a heavy rainstorm from a wastewater treatment plant would result in-over-treated drinking water.

Detailed explanation-3: -When fertilizers enter surface water, they cause problems in the watershed by-clogging narrow streams and preventing water from flowing properly.

Detailed explanation-4: -Runoff from agricultural land carries chemicals from fertilizers that collect in a lake. The buildup of chemicals can eventually cause-rainfall levels to drop causing drought and a shorter growing season. river tributaries to reroute, changing the flow of natural waterways.