http://www.pbs.org/wnet/need-to-know/environment/the-thin-green-line-investing-in-urban-parks/3637/ Manhattan's High Line, a public park built over an old elevated rail line, has helped the neighborhood's economy bloom and become an incredibly popular spot for residents. Alison Stewart speaks with the man who helped develop it and discusses how to build support for urban parks in spite of tough economic times. Need to Know airs Fridays on PBS. Watch full-length episodes of Need to Know at http://video.pbs.org/program/1458405365/
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