http://www.youtube.com/watch?v=eSYAOr0xUUo&feature=player_embedded If you had $7 million to use on behalf of the residents of your poorest slums, how would you distribute it? For Medellin, Colombia, that's a no-brainer: Blow the whole wad on a MONSTER ESCALATOR. Wait, wait! It’s actually a good idea. The giant escalator helps slum residents get to their hillside homes from the city center -- a nonsensically steep climb of more than 1,200 vertical feet. To fully appreciate how radically this thing changes the landscape of the slums, you need to watch the video above -- the BBC reports that the moving stairway turned a more-than-30-minute …
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Greg Hanscom is a senior editor at Grist. He tweets about cities, bikes, transportation, policy, and sustainability at @ghanscom.
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