If we had all the whales we used to have, they would remove the same amount of carbon in a year as 200 of the most efficient iron fertilization events.

如果我们还有那些曾经有的所有鲸鱼，它们在一年内消除的碳量将相当于200次最有效的铁质施肥所产生的效果。

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Dump iron into the sea to boost plankton growth and soak up carbon dioxide from the atmosphere.

向海洋中倾倒铁以促进浮游生物生长来吸收大气中的二氧化碳。

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In some places, though, iron is the limiting nutrient. Adding iron to such places should cause a bloom of planktonic algae, thus sucking carbon dioxide out of the atmosphere.

然而在一些地方却缺少铁物质，在这些地方添加铁物质可以产生茂密的浮游藻类，并因此能从大气层中吸取二氧化碳。

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It was when the Kyoto accord was first signed in 1997 that George started thinking of new ways to sell carbon credits and started researching iron fertilization.

CNN: Topical waters

The most dangerous asteroids contain a lot of stone or iron, according to NASA. 1998 QE2 contains a good bit of carbon and well as amino acids, the building blocks of protein.

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Ms Gillard has promised a 30% tax on iron ore and coal mining companies' profits, a tax on major polluters to help cut carbon emissions by 5% in 10 years and a broadband network for rural areas.

BBC: Gillard sworn in as Australian prime minister