You may hear so much talk about toxins — in your food, your water, your beauty products — that it can be easy to forget about the most prevalent toxic substance of all, one with which you can't help but interact on a constant basis: the air.
Amid growing concern over global climate change, you may be more aware than ever that the air we breathe is full of contaminants. On Tuesday, the World Health Organization showed the extent of the damage humans have done when it released a report saying that in 2012, 7 million people worldwide died prematurely from causes linked to air pollution. That means one out of every eight deaths was linked to pollution; in other words, nasty air is the biggest environmental threat to your health.
From the WHO's news release: