There's a silver lining in the dirty clouds, though, as the number of high-ozone days in metro L.A. has dropped by 25 percent since 2000. What are the health effects of these high pollution levels ...

L.A. Looks to Cut Smog with Leaf Blower Trade-In Cars tend to be the usual suspects when it comes to the ubiquitous ... We have a pile here of probably more than 100 dirty, stinky old leaf ...

Most of the world has dirty air, with just 17% of global cities meeting WHO air pollution guidelines, a report Tuesday found. The report, from the air quality monitoring database ...

SOME PEOPLE don't get it. While California works to clean both factory and vehicle emissions, the local smog board overseeing the state's dirtiest air has bailed in the fight. The stakes couldn't ...

If I had a dollar for every time I bring up climate change only to be met with silence and eye rolling, I’d be a rich man. But I speak up despite this because many people often misunderstand the ...

Opinion by Marek Warszawski: “It should make us feel ashamed that Valley air pollution causes so much environmental harm in the Sierra.” ...

Discover how Delhi's abrupt ban on over-age vehicles backfired, creating a strategic stalemate with environmental ...

TEHRAN, Iran — In Tehran's northern suburbs, 24-year-old Sepehr Shaygan is nursing a stubborn headache he blames on the smog. His mother puts on a surgical mask to do the shopping for a barbecue ...

Afternoon cloud cover helped Tulsaavoid another smog violation Tuesday,but the city remains on the brink ofthe "dirty-air list," and cautious officialsissued an Ozone Alert for Wednesday.