WHO

In his second global transportation donation meant to reduce death and injury from transportation, the former NYC mayor will take a decidedly urban focus by directing his foundation to select ten cities to receive $125 million, he announced Monday.
Sep 30, 2014   The Wall Street Journal
In September, 2011 the above title read two million. Figures from both years are based on reports from the World Health Organization, a United Nations agency. Is air quality getting worse, or are more deaths being attributed to air pollution?
Mar 30, 2014   The Atlantic Cities
For the first time, the World Health Organization has identified air pollution, in its entirety, as a cause of cancer, putting it on par with tobacco smoke, asbestos and arsenic. In 2010, 223,000 people died from lung cancer caused by air pollution.
Oct 18, 2013   Quartz
World annual death toll due to particulate pollution from indoor and outdoor sources is 2 million people each year, according to a new report from the World Health Organization.
Oct 3, 2011   USA Today