“Rooftop solar, and the four levers of social change” by @EthanZ https://medium.com/mit-media-lab/rooftop-solar-and-the-four-levers-of-social-change-8e64c40bd5d7#.77gu2mmop …
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“Rooftop solar, and the four levers of social change” by @EthanZ https://medium.com/mit-media-lab/rooftop-solar-and-the-four-levers-of-social-change-8e64c40bd5d7#.77gu2mmop …
