Energy/Environment What's causing all those earthquakes in Oklahoma?

New research indicates that wastewater injection by oil and gas companies is behind the skyrocketing number of earthquakes in Oklahoma.

By , Reuters

Sue Ogrocki/AP/File

A dramatic jump in the number of earthquakes in Oklahoma to a rate never seen there by scientists before, appears to be caused by a small number of wells where wastewater associated with oil and gas production is injected into the ground, a study released on Thursday said.