April was the cleanest month in nearly three decades when it comes to carbon dioxide emissions by U.S. electric power-generation plants, the Energy Information Administration reported earlier this month.
The electric-power sector emitted 128 million metric tons of carbon dioxide in April 2015.
April is typically a lower emissions month due to milder weather, but this most recent April was the lowest of any month since April 1988, according to the EIA.
April was also the month when electricity generated from natural gas surpassed coal-fired power for the first time since the EIA started collecting this data in 1973. The two fuel sources are nearly dead-even in use, but they have vastly different C02 emissions intensities; electricity produced from coal turbines emits at least 71 percent more CO2 into the air than natural gas, according to the EIA.
For the record, coal use by the electric power sector accounted for 89.4 million metric tons of carbon dioxide, while natural gas-fired generation produced 36.2 million metric tons.