Planting grass "filter strips" in sensitive areas next to streams is one thing.
Most pollution in streams is caused by agricultural runoff. Many farms and ranches do not take precautions against the runoff.
Chemical runoff in an agricultural context is when farming chemicals, such as fertilizer are not absorbed into the topsoil. When a heavy rain comes, these chemicals are caught in the storm water runoff and make their way into streams, rivers, and lakes.
Streams
Into lakes,streams, and rivers
runoff
Run off
Agricultural runoff is a form of pollution when pesticides and other waste from a large area of land form into a small group and pollutes surrounding water.
river, lakes, streams.
Runoff water
Runoff
Runoff
runoff