Net GHG emission in G20 economies 2022-2035

China was the world's biggest GHG emitter in 2022, with net emissions of 12.8 billion metric tons of carbon dioxide equivalent (GtCO₂e). Under a Current Mid-Century Commitments Scenario, China's net GHG emissions are projected to decrease by almost 25 percent by 2035 from 2022 levels, to 9.8 GtCO₂e. Despite these reductions, China would remain the world's biggest emitter by far. Meanwhile, India would surpass the U.S. as the second biggest emitter in this scenario, with the South Asian country's net GHG emissions rising 50 percent to 5.3 GtCO₂e by 2035. In comparison, U.S. emissions would fall almost 60 percent during this period.

Under the Current Mid-Century Commitments Scenario, G20 economies as a whole are projected to reduce emissions by some 25 percent by 2035, relative to 2022 levels.