The United States reached a new energy milestone in March as 10 percent of all of the electricity generated in the country came from wind and solar power. according to a new U.S. Energy Information Administration data. The EIA’s findings represent a marked increased from March 2016, when wind and solar generated 8.6 percent of total U.S. electricity. Overall, about 7 percent of U.S. electricity comes from wind and solar annually, up from less than 1 percent a decade ago. Texas is the country’s biggest wind power producer and California is the largest solar producer. Nationwide, electricity generated using wind and solar varies by the month and is highest in the spring partly because of seasonal changes in wind patterns and daylight hours. The EIA projects that wind and solar will generate 10 percent of U.S. electricity year-round by 2020. But scientists say the country’s power supply could see a larger share of wind and solar by then for at least part of the year.