The thin green line: Investing in urban parks

Last week, the Trust for Public Land issued its annual report on urban parks, which found that, in spite of the recession, cities across the country are building new ones. They are investing in green space.

In partnership with Blueprint America, Need to Know’s Alison Stewart reports from New York, where they’ll make a park out of just about anything: a garbage dump, a parking lot — even an old elevated rail line.

Watch The Thin Green Line on PBS. See more from Need To Know.