Click the image above to go to the article in which Alex Steffens, of Worldchanging (and TED, and plenty of other deserved) fame gives a synopsis on how to ramp up urban greening most efficiently:

If we’re talking about transportation, the best thing a city can do is densify as quickly as it can. That needs to be said every time this issue comes up, because it’s the only universal strategy that works. That’s the best-documented finding in urban planning—that as density goes up, trip length goes down and transportation energy use goes down.

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