According to the Energy Department's Energy Information Administration, wind and solar produced 10 percent of the electricity generated in the U.S. for the first time in March. The Hill reports: The Energy Information Administration's (EIA) monthly power report for March found that wind produced 8 percent of the electricity produced in the U.S. that month, with solar producing 2 percent. The two sources combined to have their best month ever in terms of percentage of overall electricity production, EIA said. The agency expects the two sources topped 10 percent again in April but forecasts that their generation will fall below that mark during the summer months. Due to the way geographic wind patterns affect the generation of electricity, the two sources typically combine for their best months in the spring and fall. Annually, wind and solar made up 7 percent of electric generation in 2016, EIA said.