All but one of the world’s top 20 most polluted cities last year were in Asia, a new study shows. The majority of these ...

Chad, in central Africa, is the world’s most polluted country, while California has the worst air pollution in North America, ...

Data from more than 40,000 air quality monitoring stations in 138 countries, territories and regions were analyzed for the ...

The countries with the worst air quality included Bangladesh and India, according to an annual report from IQAir.

Thirteen of the world's top 20 most polluted cities are in India, with Byrnihat in Assam topping the list, according to a new ...

Thirteen of the world's twenty most polluted cities are in India, with Byrnihat being the most polluted globally. Delhi ...

Bangkok has landed among the world’s most polluted cities, ranking eighth in the latest IQAir report, with an AQI of 141 this ...