Reducing carbon dioxide emissions is one of the key tasks in mitigating climate change. One strategy for achieving this is to to place a price on emissions of this greenhouse gas. Today, according to the World Bank, there are 73 such initiatives, whether through emissions tax schemes, cap-and-trade systems, or credits in exchange for investments in projects that reduce emissions.

A total of 39 countries have one of these schemes, in addition to 33 subnational jurisdictions. As of 2023, these initiatives cover 23% of global greenhouse gas emissions.

See a summary in this illustration from VisualCapitalist