This is because the atmosphere does not have an iron grip on the carbon-dioxide level in surface waters.
The iron-and-carbon-based ink used in one of the oldest Hebrew commentaries on the Old Testament is an example of this.
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.
Eventually, sword makers started using iron, and when they discovered they could hammer carbon into the smelt, they'd make swords out of steel.
Their results suggest 55 Cancri e is largely composed of carbon (in the form of graphite and diamond), iron, silicon carbide, and, potentially, silicates.
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.
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.
Household waste, for example, would be reduced to pure carbon, oxygen and hydrogen, along with a handful of heavier elements (tungsten, iron, aluminium and so on) which could then be re-used.
Dr Zettl and his colleagues constructed their memory cell by taking a particle of iron just a few billionths of a metre (nanometres) across and placing it inside a hollow carbon nanotube.
Ms Gillard plans a broadband network for rural areas, a 30% tax on iron ore and coal mining companies' profits, and a tax on major polluters to help cut carbon emissions by 5% by 2020.
Planktos had announced that it would dump tons of iron dust in the ocean to spark the growth of phytoplankton, and then sell credits based on how much carbon the phytoplankton consumed.
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