University of Waterloo professor says it can take up to 35 years to see the effect of pollution reduction

A professor at the University of Waterloo reports that while efforts to reduce water pollution from fertilizers have increased, Canadians will have to wait decades to see the actual results.
“Some time frames that we saw here ranged from 10 years to 30 or 35,” said Nandita Basu, associate professor of science and engineering at UW.
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