World's Top Ten Polluting Countries

China is the world's worst polluter nation with the highest overall annual emission of greenhouse gases (6,018 million ton). Australia has the world's highest per capital carbon dioxide emissions.

1. China
China is the world's worst polluter nation with the highest overall annual emission of greenhouse gases (6,018 million ton). However, in terms of percapita emissions it is ranked 44th in the world, emitting 4.5 ton (per person).

2. United States
The United States is the second worst percapita carbon emitter with for 19.78 ton of emission per person. America is also ranked the world's second highest polluter with 5,903 million tons of carbon dioxide emission.

3. Russia
Russia is ranked third with 1,704 million tons of carbon dioxide emission.

4. India
India is world's fourth biggest polluter with 1,293 million ton of carbon dioxide emission. The average person in India emits just 1.16 ton per person annually.

5. Japan
Japan comes next in the list with 1,247 million ton of carbon emission.

6. Germany
Germany is the 6th biggest polluter in the world with 858 million ton of carbon dioxide emission.

7. Canada
Canada which emits 18.81 ton of carbon per person is the world 7th worst polluter, with an absolute carbon emission of 614 million ton.

8. United Kingdom
The United Kingdom's emission stands at 586 million tons of carbon dioxide emission.

9. South Korea
South Korea comes next in the worst polluters' list with 514 million tons of carbon dioxide emission.

10. Iran
Iran has 471 million tons of carbon dioxide emission. Iran is worst hit by air and water pollution. The Caspian sea is highly polluted posing a grave threat to marine life and the ecology.