Climate Central: Carbon dioxide emissions are causing the climate to change and those changes come with a real cost. The big questions are what's the price tag for that "social' cost and when does it gets paid? According the a new report, current best estimates could actually be on the low end thanks to "unknown unknowns.'
The most recent estimate for the cost of a ton of carbon emissions -- referred to as the social cost of carbon -- is $37. That number was calculated in 2013 by 12 federal agencies using three...