Humans Affect the Oceans
and runoff and groundwater and reefs....
Runoff Affects our drinking Water and Oceans
Notice how this water is rushing through a field. Well just imagine that field having harmful pesticides on the crops, or using fertilizer that has nitrogen in it. The chemicals can lead to bad ground water or harm other plants and animals. The nitrogen found in fertilizer can cause algae overgrowth in ponds and rivers that crowd out other plants and animals from their natural environment.