Nobody walks in Los Angeles, and that means lots of cars, lots of exhaust, and a big smoggy sky. Where does L.A. rank among the globe's smog centers?
Fireworks are a beloved tradition of the Fourth of July, but the colorful displays also bring a spike in air pollution, a new study shows. Continue reading →
A recent documentary, "Under the Dome," depicts Chinese residents coping with worsening air quality. Just how bad is pollution in China?
Paris in the spring is lovely -- except when you can't breathe. Continue reading →
The removal of the documentary underscores the ruling Communist Party's sensitivity to public debate over China's notorious smog problem.
An urban plan for Paris could reduce the city's greenhouse gas emissions by up to 75 percent in 2050.
Air pollution in Beijing dropped about 4 percent last year, though levels of dangerous particulate matter remained more than three times the recommended limit.
Will the recent agreement struck between the United States and China on greenhouse gas emissions really help matters or will it all be so much hot air? Trace examines the deal and what could come from it.
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