Coal electricity declined by 12.5 percent in 2012, mostly driven by the switch to natural gas, which increased by almost the exact same amount (217 terrawatt-hours) as coal declined (216 TWh), according to new annual numbers released by the US Energy Information Administration.
Wind electricity increased as well — by about one-tenth (20.5 TWh) as much as gas. Solar increased a little more than one-hundredth as much as gas (2.5 TWh). read more »