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

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

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 ...

The South Asian countries of Pakistan, India and Bangladesh are among the most polluted countries in the world while Australia, New Zealand and Iceland are among the least polluted countries ...

More than 200 rivers around the world have been analysed to reveal the water quality and what lurks beneath the surface.

The 2024 World Air Quality Report by IQAir paints a worrying picture—only seven countries worldwide met the WHO’s PM2.5 safety guidelines last year. Here’s a look at the 10 most polluted ...

HONG KONG — Six out the world’s 10 most polluted cities are in India, while California has the worst air pollution in North America, a new report shows. New Delhi was the most polluted capital ...