The bigger case for a U.S. carbon tax

Experts say a carbon tax will enable the U.S. to implement a border-adjustment fee akin to a new policy coming out of the EU. That could help to dramatically pare down global greenhouse-gas emissions.

In this Nov. 28, 2019, file photo, smoke and steam rise from a coal processing plant in central China's Shanxi Province. (AP Photo/Sam McNeil, File)