The Arab Spring contributed to a decline in air pollution, according to new research
That's about 4,400 people per day
Levels of tiny pollutants are 42% higher on the holiday than on a typical day, one study says
About 40% of the country's 1.7 million automobiles must be off the road
'We are facing a predicament that strikes at the heart of humanity'
If you think about smog, you’re probably picturing a major city like Los Angeles, where in the 1960’s and 70’s the air was so bad that smog alerts telling people...
A new World Health Organization report details air pollution rates around the globe. Here are the cleanest cities in the country