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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This Nokia virtual-reality camera costs $60,000

Good VR doesn't come cheap, as evidenced by Nokia's Ozo 360-degree video camera. Meanwhile, Swatch's next smartwatch has mobile payments, and Blocks lets you build your own smartwatch.

by Bridget Carey