The world cannot count on them all to do it on their own. China, in particular, looks likely to fail to deliver on the fairly weak pledges it made in Paris. Fortunately, there is a stick available to encourage ambitions to decarbonize: a tariff based on the carbon embedded in the imports into the United States, the European Union and other rich countries.
We need this. It should have been implemented years ago. Along with standards bodies that measure/estimate GHG emissions.
As I type that, I realize it’s true of all climate action. But I feel like this stick might have been one of the more effective tools.