Which of these are the two major sources of nitrate pollution in rivers? the burning of fossil fuels by factories and cars animal wastes and fertilizers fertilizer runoff and the burning of fossil fuels by factories

Animal Waste and Fertilizers

Explanation:

Animals, like humans, obtain nitrogen from consuming foods. The foods that the animals consume get digested and with time, the animals release the extra undigested foods and nutrients in forms of urine and feces. Like wise, fertilizers are typically made with animal waste.