D.C. Area Tops Nation in Number of Energy-Efficient BuildingsThe nation's capital is now the top city in the country for energy-efficient buildings.
Study: Old, Small Buildings Like D.C.'s Are Better For Cities Neighborhoods with smaller, older buildings generally perform better for the local economy than areas with newer buildings that stretch an entire block.
6 Abandoned Olympic Venues You Can Still VisitIf you're tuning into the Sochi Winter Olympics this year, it's hard not to wonder what these Olympic venues will look like in ten years. While we wait for the answer, check out these abandoned Olympic venues you can still travel to.

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