Energy-efficiency positions made up nearly 75 percent of clean jobs, which include firms that upgrade electricity, heating, ventilation, and air-conditioning. The number of renewable energy jobs, which includes solar, wind, and geothermal energy, makes up about 10 percent of the total. Clean-vehicle jobs make up 8.5 percent, followed by grid and storage at about 4 percent and fuels like ethanol at 1.5 percent.

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