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Julie Jacobson, Associated Press
Senate Majority Leader Harry Reid, D-Nev., holds up cards to demonstrate the changing sizes of light bulbs for street lights during the National Clean Energy Summit, Tuesday, Aug. 30, 2011, in Las Vegas.

LAS VEGAS — Democratic Senate Majority Leader Harry Reid says construction on the world's first hybrid geothermal and solar power plant is starting in northern Nevada.

Reid said Tuesday that Enel Green Power North America's geothermal plant in Churchill County is adding a solar project.

The announcement came minutes before the start of the fourth-annual National Clean Energy Summit in Las Vegas.

Politicians and green technology leaders are attending the meeting to discuss energy security and independence.

Those scheduled to appear include Vice President Joe Biden, U.S. Secretary of Energy Steven Chu, Nevada Gov. Brian Sandoval and California Gov. Jerry Brown.

Chu said in his opening remarks that oil prices will increase while green energy will become cheaper in the future.

He also says science education is a top priority.