根据夏威夷大学的科学家的估计，到2013年初，日本海啸产生的残骸碎片在到达西海岸之前，会到达夏威夷的海岸，重量超过2000万吨。
Up to 20 million tons of tsunami debris floating from Japan could arrive on Hawaii's shores by early 2013, before reaching the West Coast, according to estimates by University of Hawaii scientists.
当你到达俄罗斯的北极海岸，首先映入你眼帘的是成吨的的垃圾和生锈的桶子。
When you arrive at the Arctic Coast of Russia the first thing you can see is tons of garbage and rusty barrels.
因此如果生产一辆车需要排放10吨的二氧化碳，而排放税是每吨60美元，那么外国到达美国的汽车就要交600美元的税。
So, if making an American car produced ten tonnes of carbon dioxide, taxed at $60 per tonne, then the tax on a foreign-made car arriving in America would only be $600.
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