According to the world bank’s “State and Trends of Carbon Pricing 2021” report, the total of 64 carbon pricing instruments applied around the world cover approx. 20 % of global GHG emissions resulting in a revenue of 53 Bn. US-$.
However, the study also highlights that most carbon prices are still too low to limit global warming to below 2°C. In order to meet the Paris Agreement, a carbon price of 40-80 $/t CO2e is recommended.