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Clean Air Study

Photo Essay: Postcards From the Second Most Air Polluted City in the World

Nina Wegner | Posted 02.11.2013 | Green
Nina Wegner

It's coming on winter, and Ulaanbaatar, the capital city of Mongolia, is making its annual transformation into the second most air polluted city in the world.

Study: Clean Air Means Longer Life

abcnews.go.com | Jay Bhatt | Posted 11.17.2011 | Healthy Living

If the air in your city is clean, you can tack on about five months to your life. So suggests a new study by researchers at Brigham Young University a...