Green Olympics: Algae turns Rio pool a strange color

Officials said that the water was tested and posed no risks to athletes. Rio spokesman Mario Andrada said the green was caused "by a proliferation of algae." "This was because of heat and a lack of wind," he said. "We did all the chemical tests.” http://www.foxnews.com/science/2016/08/10/green-olympics-algae-turns-rio-pool-strange-color.html