Platinum is a key resource for the automotive industry, and 90 percent of global reserves are in South Africa.

铂是汽车工业的一个重要资源，全球储量的90%是在南非。

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The International Energy Agency said new techniques to extract gas from previously inaccessible rock formations could extend global reserves for more than 250 years.

国际能源组织表示，从岩石中提取天然气的新技术可能延长全球储备250年的时间。

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On this chart they seem to have global reserves of hafnium at 1, 124 tonnes.

FORBES: It's 2013: Let's Check Those New Scientist Claims About Running Out Of Terbium And Hafnium

They make up less than 5% of global reserves and there are no private securities in SDRs.

ECONOMIST: Is there a better way to organise the world��s currencies?

It says Arctic oil will be needed to replace dwindling global reserves and argues that this should not prevent corresponding CO2 restrictions.

BBC: Refusal over Arctic drilling ban