Screen Shot 2017-04-26 at 10.55.32 PM

Screen Shot 2017-04-26 at 10.55.32 PM

Phosphorus leached from soil, vegetation and manure stimulates the growth of algae in surface waters. Nutrient inputs from its mainly agricultural catchment basin have earned Lake Winnipeg the title of the world’s largest eutrophic lake. Photo by Greg McCullough.