The original content of Democracy Now! Headlines appears under the Creative Commons BY-NC-ND 3.0 License (United States). For more, including their other shows and media, visit www.democracynow.org. March 25, 2014 Report: Air Pollution Killed 7 Million People in 2012 ------------------------------------------------------ In related news, the World Health Organization estimates air pollution killed seven million people in 2012. The agency said one in eight deaths worldwide were tied to air pollution, making it the single largest environmental health risk in the world. .