Dan Barasch: A park underneath the hustle and bustle of New York City

Dan Barasch and James Ramsey have a crazy plan — to create a park, filled with greenery, underneath New York City. The two are developing the Lowline, an underground greenspace the size of a football field. They're building it in a trolley terminal abandoned in 1948, using technology that harvests sunlight above-ground and directs it down below. It's a park that can thrive, even in winter.

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S2014E170 - Hans and Ola Rosling: How not to be ignorant about the world