Nature World: Oklahoma had more earthquakes than California in 2014. A new study suggests that the increase in earthquakes in Oklahoma is associated with wastewater wells used by the oil and gas industry.
Katie Keranen, professor of geophysics at the Cornell University, who conducted the study, said that earthquakes in Oklahoma account for nearly half of all seismicity occurring in central and Eastern U.S. Many of these earthquakes occurred in areas with high levels of water disposal.
Oklahoma has already...