The Guardian Animal husbandry is contaminating China's water and has been linked to bright-green lakes, a phenomenon know as eutrophication. More here. Lest we North Americans feel smug, this image shows one of countless "eutrophied" sloughs in Manitoba, on the Canadian prairies . A PinP photo. Related: In Hogs We Trust - Part 1V - The health and environmental price we Manitobans will pay for an expanded hog industry.