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.
The world can’t handle the per-capita emissions of the west — what it can handle is emissions of approximately zero. An additional industrial build-out based on fossil fuels, which will need to be scrapped before the end of its useful life, is absolutely disastrous.