According to World Bank, in 2017, 91.3% of the population was exposed to unhealthy levels of pollution (ambient concentrations of PM2.5 that exceed the WHO guideline value) in the World.
The below graph shows the percentage of the population exposed to unhealthy levels of pollution by region in 2017.
The data is from World Bank.
Definition of PM2.5 air pollution, population exposed to levels exceeding WHO guideline value (% of total)
“Percent of population exposed to ambient concentrations of PM2.5 that exceed the WHO guideline value is defined as the portion of a country’s population living in places where mean annual concentrations of PM2.5 are greater than 10 micrograms per cubic meter, the guideline value recommended by the World Health Organization as the lower end of the range of concentrations over which adverse health effects due to PM2.5 exposure have been observed.”
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