| Country | Emissions/billion tonnes | Share/% |
| China | 9.4 | 27.8 |
| United States | 5.2 | 15.2 |
| India | 2.5 | 7.3 |
| Russia | 1.5 | 4.6 |
| Japan | 1.1 | 3.4 |
| Germany | 0.7 | 2.1 |
| South Korea | 0.7 | 2.1 |
| Iran | 0.7 | 1.9 |
| Saudi Arabia | 0.6 | 1.7 |
| Canada | 0.6 | 1.6 |
| Total | 23 | 67.7 |