The Smart Girl's Guide to the Smart Grid (and Other Clean Technology)

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In May, many of us shuddered in horror as meters indicated the amount of carbon dioxide in the atmosphere had climbed to levels unseen in 3 million years, exceeding 400 parts per million. With the environment in death throes, the bankruptcy of Hostess, and the existence of a Ryan Lochte reality TV show, it’s easy to feel like the end-of-days is nigh. But before you start thinking you may never have to figure out what a 401K is, here’s a small sampler of what’s gaining ground in clean tech so you can go ahead and allow yourself a little optimism. [Image: Getty Images]

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