President Joe Biden is moving to ban new offshore oil and gas drilling in most U.S. coastal waters, a last-minute effort to block possible action by the incoming Trump administration to expand offshore drilling.

A new report issued Tuesday said fracking poses a risk to drinking water in some circumstances, but a lack of information precludes a definitive statement on how severe the risk is.

President-elect Donald Trump supports completion of the disputed Dakota Access oil pipeline in the Midwest, based on policy and not the billionaire businessman's investments in a partnership building the $3.8 billion pipeline, according to an aide's memo.