Wall Street Journal: The “American Clean Energy and Security Act” is one of the most ambitious efforts to re-engineer American social and economic behavior in decades, presenting risks and opportunities for a wide array of businesses from Silicon Valley to the coal fields of the Appalachians. The legislation, better known as the Waxman-Markey bill, isn’t yet law and has big hurdles to clear. A critical vote looms this week in the House Energy and Commerce Committee. But even with its chances of passage …