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View Diary: Solar Energy Cheaper than Coal? (351 comments)

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  •  actual info is here (0+ / 0-)

    http://www.nature.com/...

    full text is pay or from a subscribing institution.

    Uses indium arsenide, giving both resource - indium is fairly rare - and environmental - arsenic is toxic - concerns.  From reading it you're looking at something that is at least a decade out, if not further.

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