Topics on today's show include:

* Shale pioneer Harold Hamm has invited Senator Elizabeth Warren to tour shale sites in her home state of Oklahoma;

* Schlumberger has committed to meeting the U.N. Paris Agreement’s emission-reduction targets;

* Norway’s financial regulator says ‘green’ investing has a dark side;

* And finally today, the U.S. Department of Energy has won the dubious distinction of coining the worst phrase of 2019.

Also for the last two weeks of December, we'll do a weekly recap episode on December 27th and January 3rd. Daily episodes will resume on Monday, January 6th.