China, the most populated country is also the most polluting country, as it releases 6,108 million tonnes of greenhouse gases (GHGs). Not far behind is USA, which is the largest economy and also the 2nd most polluting country. It releases 5,833 million tonnes of GHGs. Before 2007, it was USA which was the biggest polluter.
The next culprit of global warming is Russia which even though has less population of 141,950,000 compared to US and China, still releases considerable amount of CO2 - 1,704 million tonnes. India which has the 2nd largest population of 1,139 million releases 1,293 million tonnes of GHGs per annum and hence the 4th place.
Germany which releases 858 million tonnes gases per annum is ready to cut emission of CO2 by 3% each year. On the other hand, Russia says it is all set to cut GHG emissions by 25% when others concur to make the same attempt.