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Which of these are the two major sources of nitrate pollution in rivers?

a. the burning of fossil fuels by factories and cars

b. animal wastes and the burning of fossil fuels by cars

c. animal wastes and fertilizers

d. fertilizer runoff and the burning of fossil fuels by cars

e. animal wastes and the burning of fossil fuels by factories

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Deanna Hettinger
Deanna HettingerLv2
12 Mar 2020
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