October 20, 2008 - News brief -
Shares down 20 percent as company says it's considering a sale, licensee or new equity round to get cash to scale production.
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September 30, 2008 - News brief -
Promethean Power Systems says solar-powered cooling unit uses thermoelectric technology to reduce power consumption.
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December 18, 2008 - Exclusive -
Gary Rieshel of Qiming Venture Partners describes why China is emerging as a lab for water and cleaner coal technologies.