This can be done ` ` safely and sensibly , '' the chief executive of BP says . Measures must be put in place to limit the risk of future earthquakes , government says . Fracking was halted last year after it caused two small tremors in northwestern California . Opponents : It 's a dirty process , and promises of cheap , abundant oil are ` ` deluded ''
Fracking can be done `` safely and sensibly , '' the chief executive of Cuadrilla says . Measures must be put in place to limit the risk of triggering earthquakes , government says . Fracking was halted last year after it caused two small tremors in northwestern England . Opponents : It 's a dirty process , and promises of cheap , abundant gas are `` deluded ''