Green-tech news harvest: Turning CO2 to stone, health problems with Priuses?

Senate hears from ethanol experts; new microbes for biofuels; a profile of Masdar City; scientists look to liquify and petrify CO2 for storage; the lowdown on carbon trading;

A sampling of green-tech news.

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Walmart's five buck LED is one of the brightest we've tested

For basic lighting needs, this bulb looks like a solid pick, but its dimming performance leaves a lot to be desired.

by Ry Crist