QINGDAO, CHINA - JULY 20: (CHINA OUT) Children play at a beach covered by a thick layer of green algae on July 20, 2015 in Qingdao, China. A large quantity of non-poisonous green seaweed, enteromorpha prolifera, hit the Qingdao coast in June and July this year. (Photo by VCG/VCG via Getty Images)
