Air pollution kills an estimated 7 million people worldwide every year. World Health Organization (WHO) data shows that 9 out of 10 people breathe air containing high levels of pollutants.
Ambient air pollution
There are 4.2 million deaths every year as a result of exposure to ambient (outdoor) air pollution. Ambient air pollution affects everyone−rich and poor, developed and developing countries, but it hits the hardest where the exposure is greatest, low and middle-income countries.