WE NEED TO SAVE THE EARTH BY ALGAE FUEL THAT PRODUCT OXYGEN AND REDUCE CO2 FOR HUMAN BEENS http://edition.cnn.com/2014/03/25/health/who-air-pollution-deaths/ http://www.theguardian.com/environment/2014/mar/25/air-pollution-kills-7m-people-a-year http://www.bbc.com/news/health-26730178