Air Pollution in India and California
Six out of the world’s 10 most polluted cities are in India, while California has the worst air pollution in North America, according to the 2024 World Air Quality Report. India saw a 7% decline in PM2.5 concentration in 2024, but air pollution remains a significant health burden. China recorded lower air pollution levels in more than 300 cities in 2024, with the goal to reduce annual average PM2.5 concentration levels below 25 micrograms per cubic meter.