The "Internet of things" promises a world with smart connected devices such as refrigerators that automatically order food and robots that anticipate our desires. On today’s show we hear how that vision is coupled with a push to run those machines, and our online lives, on cleaner power. California plans to get half of its energy from renewable sources but some advocates say the state should make a national statement by aiming for 100% clean electricity. Not everyone agrees on how the existing energy grid can integrate new technologies, or whether getting to 100% is even technically possible yet.
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