Answer;
-All of the above
-Storms, factories, and farms
Explanation;
-There are many causes for water pollution but two general categories exist: direct and indirect contaminant sources.
-Direct sources include effluent outfalls from factories, refineries, waste treatment plants etc.. that emit fluids of varying quality directly into urban water supplies.
-Indirect sources include contaminants that enter the water supply from soils/groundwater systems and from the atmosphere via rain water. Soils and ground waters contain the residue of human agricultural practices (fertilizers, pesticides, etc..) and improperly disposed of industrial wastes.
