In other energy news, newly released figures show more electricity was produced in the United States in April from natural gas than coal for the first time ever. Meanwhile, the Oklahoma Supreme Court has unanimously ruled that state residents can sue oil and gas companies for damage or injury caused by earthquakes, which have been linked to fracking. Before the fracking boom, the state had an average of one or two 3.0-magnitude earthquakes a year. Now, according to the U.S. Geological Survey, the state averages two earthquakes of that magnitude every single day.