Eco-minded exec Musk leaves Zuckerberg's political group

Elon Musk, CEO &#111;&#102; electric-car company Tesla Motors, bows &#111;&#117;&#116; &#111;&#102; Facebook head Mark Zuckerberg's political action group &#097;&#102;&#116;&#101;&#114; &#116;&#104;&#101; group funds ads &#116;&#104;&#097;&#116; rile &#116;&#104;&#101; Sierra Club, MoveOn.org, &#097;&#110;&#100; others. <a

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