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Based on the image, identify the required characteristic for solar thermal energy met by the states in the southwestern United States.
"Crescent Dunes Concentrating Solar Plant Begins Producing Electricity." Today In Energy. U.S. Energy Information Administration, 03 Mar. 2016. Web. 29 Mar. 2016. http://www.eia.gov/todayinenergy/detail.cfm?id=25212.
Large quantities of water.
Consistently high temperatures.
Large amounts of land.
High geothermal gradient.