Rooftop solar key topic at clean energy summit in Las Vegas

President Barack Obama, accompanied by Commander of the 89th Airlift Wing Colonel John C. Millard, walks towards Air Force One at Andrews Air Force Base in Md., Monday, Aug. 24, 2015, en route to Las Vegas, Nev. where the the President will speak at the National Clean Energy Summit. (AP Photo/Jose Luis Magana)LAS VEGAS (AP) — The costs and benefits of rooftop solar electricity in Western states emerged as a key topic during an annual green power conference hosted Monday by U.S. Sen. Harry Reid in Las Vegas.

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