Choice Between Food & Light
发布时间 2010-05-18 18:34:37 来源
摘要
Amit Chaudary discusses why the solar-charged light isn't more prevalent, despite its relatively low cost. Recorded in Bhojaka, India.
From Stanford Business magazine: http://www.gsb.stanford.edu/news/bmag/sbsm1005/feature-dlight.html
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