Inhabitat's Week in Green: portable fission reactor, Urbee 2 and the ix35 Fuel Cell car

Each week our friends at Inhabitat recap the week's most interesting green developments and clean tech news for us -- it's the Week in Green.

Silicon Valley dominated this week's news cycle, beginning with Yahoo's announcement that it will no longer allow employees to work from home. Some are crying foul, however, pointing out that Yahoo CEO Marissa Mayer recently installed a nursery in her office, and that unlike most mothers, she's allowed to bring her child to work. But while Yahoo's announcement may have ruffled some feathers, Google gave greenies reason to smile, as it announced plans to build a jumbo, green-roofed expansion at the tech giant's Mountain View headquarters. Not to be outdone, Samsung unveiled plans to build a garden-filled, eco-friendly Silicon Valley headquarters of its own.

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