A canopy of oak trees on Queens Road West in Charlotte, N.C. Charlotte ranks 13th among the fastest-growing 50 U.S. metropolitan areas, and the city now works sustainability into its overall development strategy. Photographer: Chuck Burton/AP Photo
A canopy of oak trees on Queens Road West in Charlotte, N.C. Charlotte ranks 13th among the fastest-growing 50 U.S. metropolitan areas, and the city now works sustainability into its overall development strategy. Photographer: Chuck Burton/AP Photo
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