Share of jurisdiction's GHG emissions covered by ETS 2023

The share of emissions covered by emissions trading systems (ETS) around the world varies widely by jurisdiction. As of March 31, 2023, the EU ETS covered roughly 38 percent of EU greenhouse gas emissions. Meanwhile, the recently launched national ETS in China covered nearly 31 percent of the country's total GHG emissions, or roughly 4.5 billion metric tons of carbon dioxide equivalent. This makes it the largest carbon market in the world in terms of emissions covered.

The sectors covered by ETS differ among jurisdictions. For example, the China ETS and RGGI currently cover CO₂ emissions from their respective power sectors, while the EU ETS covers emissions from the power sector, domestic aviation, and industrial activities.