Most ships run on bunkerfuel, which is cheaper than distillate, but more polluting.
大部分船舶使用的燃料是锅炉燃油，较蒸馏油便宜，但会带来更多的污染。
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The Transpacific Stabilization Agreement bunker charge, a benchmark fuel surcharge imposed by shipping firms on sea freight, has risen from $455 per 40-foot equivalent unit in January 2007 to $1,130.