Biologists at a Canadian university have come up with a way to make hog waste less of a pollutant to the environment.
The researchers have figured out how to reduce phosphorous, in hog manure. Injecting a phosphorous-digesting enzyme from a bacterium into a pig's DNA ... causes the hogs to produce manure containing 75% less phosphorous.
Unlike other livestock, including cows and sheep, pigs lack the enzyme that breaks down phosphorus compounds in plant-based feed. As a result, the phosphorous-tainted waste leaches into the soil and into groundwater.