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As for companies invested in the space - I think its important to distinguish between a good investment and a material climate change technology - you can have the first without the second, even in the "clean tech" space.

"Power Q&A: Vinod Khosla". Interview with Elizabeth Gettelman, www.motherjones.com. April 21, 2008.
As for companies invested in the space - I think its important to distinguish between a good investment and a material climate change technology - you can have the first without the second, even in the clean tech space.