Unfortunately, number six fuel oil is still used by most merchant ships and warships today because it is inexpensive compared to other types of more refined fuel which would burn cleaner. Because boiler technology has advanced since World War Two, ships burn fuel more efficiently but the pollution they generate is still shocking — more than 5% of global CO2 emissions come from ships. The source for this is the International Maritime Organization, an agency of the United Nations supported by all major nations of the world. CO2 emissions from shipping is estimated to be 4 to 5 percent of the global total and is estimated to rise by up to 72 percent by 2020 if no action is taken.
From the Guardian of London:
- • Maritime emissions not covered by Kyoto accord
• Studies suggest 75% rise in 15 years as trade grows