Large-scale livestock operations face a big challenge: how to
handle all the manure the animals produce. Manure spills and runoff can
contaminate water with nitrogen and phosphorous. The result can be
polluted drinking water, or fish kills in streams and lakes. But now,
Purdue University researchers have found a way to significantly lower
the
pollutants in hog manure. The Great Lakes Radio Consortium’s Wendy
Nelson reports: