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。