Related topics: air quality

What you should know about air quality alerts

"It's a code red day for ozone." If you hear this on your local news, what does it mean? Are you at risk? Do you know what to do? An air quality alert like this informs the public about pollution levels in the air and advises ...

China sets pace for smoggy Hong Kong: think-tank

Beijing's decision to come clean on its dirty air has embarrassed Hong Kong, where smog kills hundreds of people a year, hurts business and drives away talent, a think-tank has said.

Japan proposes pollution meeting with China

The foreign ministry in Tokyo on Friday proposed a meeting with Chinese officials about the choking smog over Beijing that is now being seen in Japan.

China 'exporting' ozone pollution to US, study says

Progress slashing unhealthy ozone in the western United States has been largely undone by pollution wafting across the Pacific from China, according to a study published Monday.

The world's most polluted cities

Paris has leapt into the headlines over an alert for dangerous atmospheric particles, yet it does not ordinarily count among the world's most polluted cities.

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