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The U.S. (California in particular) is a leader in installing a smart grid, so vital to getting the most out of charging electric vehicles in a cheap and more green way. California may be leading, but they are certainly not running alone. There's Boulder, for one. And we covered the UK's pricey discussion earlier this month. Now Michael Setters, the director of Smart Electric News, puts the broader European efforts into perspective.

Long-term, the automotive propulsion future belongs to either pure electric cars or hydrogen-powered vehicles. On this, most of us can agree. How and when and all sorts of other nit-picky details will take about as long to work as it does for Apple to release this dang SDK for the iPhone. One important step along the way will be the rollout of a smart grid, an enhanced version of the current power grid where our houses and cars can talk to the grid in various ways.