Levels of phosphorus in the Great Lakes are rising and endangering the aquatic food chain and human health, a U.S.-Canadian agency says. The International Joint Commission urged a renewed effort to get the oxygen-depleting chemical out of the water, Canadian Broadcasting Corp. reported Wednesday. The commission made the recommendation to both the U.S. and Canadian governments in its biennial report on the state of the Great Lakes given at Wayne State University.

http://www.upi.com/Science_News/2011/03/09/Great-Lakes-phosphorus-levels-worrisome/UPI-86351299723790/
http://www.windsorstar.com/Alarm+sounded+over+Great+Lakes+health/4414340/story.html