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 ...

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.

The Phoenix area's long-standing ozone pollution issues could have serious impacts on local economic competitiveness and ...

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

BANGKOK: Residents of the Thai capital once again face unhealthy air quality today, as IQAir places Bangkok firmly in the top ...

The U.S. Environmental Protection Agency cancelled a grant that would monitor air pollutants near the Delaware City Refinery.

Mexico City received an environmental contingency warning for the third day in a row on Wednesday due to a high level of air ...

City Hall has triggered a ‘high’ air pollution alert in London. Learn about the reasons and implications of this warning.

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 cities – 13 – are in the world’s most populous country, India ...