The U.S. Air Force is supporting development of the largest North American solar plant to provide electricity for the Nellis Air Force Base located outside Las Vegas which covers 140 acres of the Nevada desert with massive photovoltaic arrays that track the sun.

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They continued recording and touring well into the 1990s, supporting Bob Dylan and veterans of Led Zeppelin Robert Plant and Jimmy Page.

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He soon broke ranks with utility executives by supporting a cap-and-trade system for sulfur dioxide and other coal-plant pollutants.

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