The United States produced 7 billion metric tons of carbon dioxide equivalent greenhouse gas emissions in 2025, the second largest in the world after greenhouse gas emissions by China and among the co
Transportation is the largest source of greenhouse gas emissions in the U.S.
The total greenhouse gas emissions of the People's Republic of China are the world's highest, accounting for 35% of the world's total, in 2023, according to the International Energy Agency. The countr