Some oil refineries will probably struggle to replace imported crude oil if President Trump imposes 25 percent tariffs on products from Canada and Mexico.

The energy giant is spending nearly $50 billion to expand the Tengiz oil field, allowing it to pump one million barrels a day.

The industry is pumping ever more oil and natural gas, but it is doing so with only about three-quarters as many workers as it employed a decade ago.

The high court declined to hear a challenge to a major case in which Honolulu is suing energy companies over climate change.