The life expectancy for a child born today will be shortened by an average of 20 months by breathing polluted air, according to The State of Global Air report.
The study published by the Health Effects Institute and the University of British Columbia shows that toxic air is the fifth leading cause of early death globally.
It warns that children in South Asia will be hit the hardest with their lives expected to be shortened by 30 months from a combination of outdoor and indoor air.
In sub-Saharan Africa, a child's life expectancy could be shortened by 24 months, 23 months in East Asia and 20 months for those in developed parts of the Asia Pacific and North America.

Trump touts $5,000 payout if Republicans win as Vance waits in wings
Search expands after Philippine ferry fire kills five and leaves dozens missing
Trump says Iran war to end after US midterm elections
US military says it struck vessel in Caribbean, killing 3
At least 14 killed in explosion at weapons depot in Syria
US hits five Iranian oil tankers after attack on Navy ships
UK gives air traffic provider a week to probe outage that halted flights
Serbia's President Vucic dissolves parliament, calls snap elections
