Data from more than 40,000 air quality monitoring stations in 138 countries, territories and regions were analyzed for the ...
Discover which cities lead in size with their urban and metropolitan populations, such as Tokyo, Delhi, Shanghai and, of course, São Paulo.
The countries with the worst air quality included Bangladesh and India, according to an annual report from IQAir.
The countries with the worst air quality included Bangladesh and India, according to an annual report from IQAir.