"The two most important carbon markets so far – the EU Emissions Trading System (EU-ETS) and the UN's carbon offsetting scheme, Clean Development Mechanism (CDM) – are failures, yet, new carbon markets based on these schemes are being planned"
Why are carbon markets failing? | The Guardian
https://www.theguardian.com/sustainable-business/blog/why-are-carbon-markets-failing
Seems to be about failing #Cap&Trade , not #CarbonTax .