Limiting the amount of human waste and chemicals in run-off will decrease

a. air pollution.

b. soil pollution.

c. water pollution.

d. sound pollution.

Run off refers to water drainage or canals. Limiting the amount of human waste and chemicals in this certain areas will decrease water pollution. Not only that, it will also decrease the possibilities of floods in the various places.

It will lessen the chemicals that pollutes our water and result to water pollution.