28 Apr '11, 3pm

Watch a PEM Fuel Cell Power Up MP3 Player (Video)

Watch a PEM Fuel Cell Power Up MP3 Player (Video)

, which also posted this video, states, "It's worth noting every single time this comes up that the energy required for this step ("A PEM water electrolyser is show on the background (blue device) to generate pure hydrogen and oxygen gases on demand from distilled water.) is necessarily always higher than the energy released in the fuel cell. That is: This is not a perpetual energy machine, and this is not a -source- of power. It's a more convenient way of consuming it that allows different types of energy storage."

Full article: http://www.treehugger.com/files/2011/04/watch-a-pem-fuel-...

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A Real Transparent Solar Cell from MIT

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renewableenergyworld.com 26 Apr '11, 3pm

When a penny stock outfit working with a University of South Florida professor announced it had a clear solar window last ...