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

while Lake Chad, one of Africa's largest freshwater bodies, is a vital resource for the region. Main roads connect major cities, but many rural routes are difficult to navigate, especially during ...

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.

The most polluted country was Chad, which had an annual PM2.5 concentration ... with six of the world’s nine most polluted cities. The country’s capital, Delhi, remained the world’s most ...

The only city outside of Asia featured on the list is N’Djamena, the capital of Chad in central Africa – which was named the country with the worst air pollution. Meanwhile the cities with the ...