While solar energy has lagged behind other renewable energy sources in the United States, the numbers are forecasting up, according to a recent report released by Wood Mackenzie Power & Renewables and the Solar Energy Industries Association.
The report said that solar installations have doubled in the last three years to 2 million and they are set to double again in four years, hitting 4 million in the U.S. Just three years ago the nation had only 1 million installations.
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