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Today’s electric system is almost unrecognizable from the electric system a decade ago. Generation from natural gas and renewables has accelerated to replace the rapid and unprecedented retirement of coal-fired generators. Wind, solar, and geothermal electric generating capacity in the United States has now eclipsed capacities from hydroelectric and nuclear resources combined.

April 2015 was the first month ever in which more electricity was produced from natural gas-fired generators than from coal-fired generators nationwide, according to data released last week by the EIA. The EIA’s monthly update includes data through April 2015, so we do not yet know how natural gas fared against coal in May and June.

In addition, this April saw the lowest amount of coal-fired generation in 32 years—not since April 1983 has coal-fired generation been as low as it was in April 2015.

In 2014, the U.S. electric system looked remarkably different from how it looked ten—or even five—years ago. In the past year alone, the system nearly doubled the amount of incremental installed capacity from renewables as compared to 2013, saw a 13 percent increase in renewable generation, and reached the lowest level of CO2 emissions since 1996.