What are the key findings of Chicago University’s Air Quality Life Index (AQLI) 2023 study?
Air pollution is the greatest external threat to life expectancy on Earth now — the average person globally is losing 2.3 years. This is also deeply unequal — some parts are relatively clean while in some places, air pollution is taking even more years off a person’s life. South Asia is the most polluted region — in India, breathing the air that exists today over a lifetime means an average Indian is losing about five years of their life expectancy.

What exactly does particulate air pollution do to human beings?