File photo dated 10/04/15 of air pollution over London. Air pollution is a bigger global killer than smoking, research has shown. PRESS ASSOCIATION Photo. Issue date: Tuesday March 12, 2019. A new study suggests that 8.8 million deaths per year around the world can be attributed to dirty air, chiefly fine sooty particles pouring out of vehicle exhausts, factories and power plants. See PA story Health Pollution. Photo credit should read: Nick Ansell/PA Wire
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