Biology, 01.09.2019 10:30 beausisugpula

Which is a reason for the rise of nitrate levels in ground water?
a) overuse of fertilizers
b) ammonification by animals
c) soil erosion at grasslands
d) nitrogen fixation by azotobacter

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Which is a reason for the rise of nitrate levels in ground water?
a) overuse of fertilizers <...