The Paris Agreement has mostly been greeted with enthusiasm, though it contains at least one obvious flaw. Few seem to have noticed that the main tool mooted for keeping us within the 2℃ global warming target is a massive expansion of carbon trading, including offsetting, which allows the market exchange of credits between companies and nations to achieve an overall emissions reduction. That's despite plenty of evidence that markets haven't worked well enough, or quickly enough, to actually keep the planet safe.