CNN: More than two million people are dying every year from the effects of outdoor air pollution, according to a new study.
An estimated 2.1 million deaths are caused by anthropogenic increases of fine particulate matter (PM2.5) while a further 470,000 are killed annually as a result of human-caused increases in ozone pollution.
Jason West, co-author of the study published in the journal of Environmental Research Letters said: "Outdoor air pollution is an important problem and among the most important...