Dave Roberts - The brutal logic of climate change - 2C *not* safe, yet we're headed for worse. Course change needed ASAP. (Anyone else awake locally?)

See Dave Roberts on this, in Grist. Summarized:

A new [? - ed.] peer-reviewed paper by climate scientists Kevin Anderson and Alice Bows ... paints a grim picture:

• The commonly accepted threshold of climate "safety," 2 degrees C [3.6 degrees F] temperature rise over pre-industrial levels, is now properly considered extremely dangerous;
• even 2 degrees C is drifting out of reach, absent efforts of a scale and speed beyond anything currently proposed;
• our current trajectory is leading us toward 4 or 6 (or 8 or 10) degrees C, which we now know to be a potentially civilization-threatening disaster.

Wouldn't it be smarter to talk about this?