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In the third of our "Countdown to Copenhagen" feature articles in the run up to next week's United Nations Climate Change Conference, Bunker Index reveals the list of the top 20 countries in a comparison of CO2 emissions from marine fuels around the world.

According to data recently released by the International Energy Agency (IEA) for the 1971-2007 period, the country with the most CO2 emissions from marine fuels in 2007 was Singapore, the world's leading bunker port with 97.28 million tonnes of CO2. The city-state was closely followed by the United States with 95.96 million tonnes of CO2.

The data shows that the top 5 countries - Singapore, United States, Netherlands, United Arab Emirates and Korea accounted for 319.26 million tonnes of CO2 in 2007, or 52.3 percent of the world's emissions from marine fuels, estimated to be 610.4 million tonnes of CO2.

Meanwhile, the top 10 countries in the list accounted for 448.78 million tonnes of CO2 in 2007, or 73.52 percent, whilst CO2 emissions from the top 20 nations represents 88.04 percent of global emissions from bunker fuel.

Please find a table below with the data. Emissions are in millions of tonnes of CO2. Please note that CO2 emissions data from marine fuels in the Russian Federation was not made available.

No.	Country	CO2 emissions	%
1	Singapore	97.28	15.94
2	United States	95.96	15.72
3	Netherlands	50.92	8.34
4	United Arab Emirates	44.22	7.24
5	Korea	30.90	5.06
6	Belgium	29.54	4.84
7	China	28.70	4.70
8	Spain	26.71	4.38
9	Hong Kong	25.95	4.25
10	Japan	18.61	3.05
11	Brazil	11.44	1.87
12	Italy	11.07	1.81
13	Greece	10.05	1.65
14	Germany	9.66	1.58
15	France	9.20	1.51
16	Saudi Arabia	8.66	1.42
17	South Africa	8.06	1.32
18	United Kingdom	7.32	1.20
19	Taiwan	6.62	1.08
20	Sweden	6.54	1.07