By Richard Black
Environment correspondent, BBC News, Cancun, Mexico
Ships could be charged different fees to dock depending on how much carbon they emit, according to ideas being discussed at the UN climate summit.
The government of Papua New Guinea is considering the plan, and is hoping other nations may become involved.
The Carbon War Room, co-founded by Sir Richard Branson, has launched an online tool grading 60,000 commercial vessels according to their emissions.
Shipping contributes about 1Gt of CO2 each year, more than the entire UK.
Currently shipping fuels are exempt from national carbon accounts, which has caused much head-scratching about how their emissions could be curbed.
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http://www.bbc.co.uk/news/science-environment-11931883Soooooo ... PNG takes the lead, while the US is considered an obstacle to combating GW ? Makes me so proud of my country. :sarcasm: