Reuters: Air pollution killed about 7 million people in 2012, making it the world's single biggest environmental health risk, the World Health Organisation (WHO) said on Tuesday.
The toll, a doubling of previous estimates, means one in eight of all global deaths in 2012 was linked to polluted air and shows how reducing pollution inside and outside of people's homes could save millions of lives in future, the United Nations health agency said.
Air pollution deaths are most commonly from heart disease,...