Aug 18 (Reuters) - U.S. Democratic presidential candidateHillary Clinton said in a Twitter post on Tuesday that drillingfor oil and gas in the Arctic Ocean was "not worth the risk."
"The Arctic is a unique treasure," Clinton said.
The Obama administration on Monday gave Royal Dutch Shell final approval to resume drilling in theenvironmentally fragile ocean for the first time since 2012. (Reporting by Emily Stephenson and Amanda Becker; Editing byLisa Lambert)