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Ian Lovett of The New York Times discusses California's new air pollution standards.
An innovative project in Louisville, Ky. tracks asthma, air pollution
Third installment about education in Japan from PBS documentary series "Time for School"
Pope Francis calls for peace and dignity for the poor at UN
Shields and Brooks on Boehner’s leadership turmoil, Pope Francis’ uplifting visit
Watch John Boehner's full statement on his resignation
Full video: Pope Francis' address to the UN General Assembly
What did and didn't get done at the U.S.-China White House summit
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