Independent: What do you think is the worlds largest cause of preventable deaths? Smoking? Poor diet? Blood pressure?
It is air pollution, which led to a staggering 7 million deaths in 2012, according to the World Health Organisation (WHO).
Findings revealed it was the cause of one in eight global deaths, more than doubling previous estimates and confirming pollution as the worlds biggest environmental health risk.
Exposure to fumes both indoors and outside leads to strokes, heart disease, cancer and...