Environment

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FILE - This undated file image provided by the South Carolina Department of Agriculture in September 2013, shows examples of new tourism oriented signs the state of South Carolina is providing for businesses to attract visitors to rural and agricultural attractions. Four of the new signs will be in place by the end of April 2014, with an additional 18 more approved and expected to be put up by the end of the year. (AP Photo/South Carolina Department of Agriculture, File)

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In this April 16, 2014 photo, logs from cut down trees lay next to abandoned houses in an area that has been cleared by Hantz Farms for their urban agriculture project in Detroit. Mike Score, president of Hantz Farms, says plans call for 15,000 trees to be planted May 17, for Hantz Woodlands. (AP Photo/Detroit Free Press, Ryan Garza) DETROIT NEWS OUT; NO SALES

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In this April 16, 2014 photo, Hantz Farms President Mike Score poses for a photo at a lot that is being prepped and cleared for spring planting of tree saplings for the Hantz Woodlands urban agriculture project in Detroit. Score said plans call for 15,000 trees to be planted May 17, for Hantz Woodlands. (AP Photo/Detroit Free Press, Ryan Garza) DETROIT NEWS OUT; NO SALES