The Week in Pictures: Carteret Islands Sink, Fall Foliage, Flies on Mount Everest, and More (Slideshow)

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From the news that the world's airlines pledge to cut emissions 50% by 2050 to our interview with filmmaker Jennifer Redfearn -- who discussed her documentary on the Carteret Island climate refugees -- a lot happened this week in green. The 2009 Solar Decathlon turned the National Mall into a solar village, house flies discovered at Mount Everest's 17,585' high base camp -- the effect of warmer temperatures -- and readers sent in photos of leaves, trees, and more in our weekly slideshow: Fall Foliage. Find out what else happened in the world of green this week in our photo roundup of most popular, most important, and most oddball stories. And if you missed it, view last week's Terrific TreeHouses, BPA Makes Girls Mean, Blogger 9 Years No Money, and More .

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