Next Green Thing: Cities and Climate Change

For our regular series "The Next Green Thing," we're taking a look at what cities are doing to curb greenhouse gas emissions.

While cities accommodate half of the world's population, they consume 75 percent of its resources. But policy makers from New York, Toronto, London, and the not-so-urban Cape Cod gathered for a conference Monday at the Massachusetts Institute of Technology in Cambridge to share ideas on how cities can reduce their energy use and improve transportation.

Andrew Blum, a contributing editor for WIRED and Metropolis magazines, moderated one of the panel discussions. We called him Tuesday morning to find out what projects cities are taking on to reduce their carbon footprint.

(Photo by Jacob Bøtter)