found that just 17 per cent of cities meet the World Health Organisation's (WHO's) air pollution guidelines. As this map reveals, 91 per cent of all countries had unsafe levels of air pollution in ...

According to the ranking in IQAir's 2024 World Air Quality Report, these are the 10 U.S. cities with the worst pollution in North America: While eight of the most polluted U.S. cities in North ...

China is the world’s largest carbon dioxide emitter but in recent years has waged a campaign against air pollution, particularly in the cities that have fuelled its economic growth, and has ...

The rate at which the planet is warming has sped up since 2010, and now researchers say that China's efforts to clean up air ...