Chris Woodford has written and edited dozens of science education books, including the bestselling 'Cool Stuff' series. His previous titles include Cool Stuff & How it Works (DK, 2005), Science: A Children's Encyclopedia (DK, 2014), and Atoms Under the Floorboards (Bloomsbury, 2015).

Full of scary information ... Bad air lowers life expectancy around the world and the insidious effects start early. "If you're a 12-year-old growing up in London, dirty air (largely from traffic) is making it significantly more likely that you'll suffer from depression by the time you hit 18," Woodford states.

Chris Woodford has written and edited dozens of science education books, including the bestselling 'Cool Stuff' series. His previous titles include Cool Stuff & How it Works (DK, 2005), Science: A Children's Encyclopedia (DK, 2014), and Atoms Under the Floorboards (Bloomsbury, 2015).

Full of scary information ... Bad air lowers life expectancy around the world and the insidious effects start early. "If you're a 12-year-old growing up in London, dirty air (largely from traffic) is making it significantly more likely that you'll suffer from depression by the time you hit 18," Woodford states.

Chris Woodford has written and edited dozens of science education books, including the bestselling 'Cool Stuff' series. His previous titles include Cool Stuff & How it Works (DK, 2005), Science: A Children's Encyclopedia (DK, 2014), and Atoms Under the Floorboards (Bloomsbury, 2015).

Full of scary information ... Bad air lowers life expectancy around the world and the insidious effects start early. "If you're a 12-year-old growing up in London, dirty air (largely from traffic) is making it significantly more likely that you'll suffer from depression by the time you hit 18," Woodford states.