Pollution killed 9 million people in 2015
First global look finds that dirty air, water and soil are to blame for one in six premature deaths
![New Delhi](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/10/102017_LB_air-pollution_main_free.jpg?fit=860%2C460&ssl=1)
SILENT KILLER Pollution, especially dirty air such as seen here in New Delhi, is linked to roughly one-sixth of the world’s premature deaths, a new study finds.
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