And around a third of the cash went on cross-border deals, a doubling of the level in 2004.

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Foxconn has raised basic wages four times in the past three years, in some areas doubling the starting-level pay.

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In a non-linear problem, the most relevant number for projecting sea level rise is the doubling time for the rate of mass loss.

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The increase in the LME copper stockpile has been particularly noticeable, more than doubling from around 210, 000 ton in September to a current level of 530, 000 tons, with most of the increase coming in the past two months, lifting the stockpile close to a five-year high.

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We are currently faced with unprecedented environmental and global challenges - population growth - that is expected to level at 9 billion people within four decades, requiring a doubling of food production in three decades, and adequate energy for basic needs.

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Blue chips were on pace to exceed their record closing level, October 2007's 14164.53, after more than doubling from a low of 6547.05 in March 2009.

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Hansen suggested that a 10-year doubling time was plausible, pointing out that such a doubling time from a base of 1 mm per year ice sheet contribution to sea level in the decade 2005-2015 would lead to a cumulative 5-metre sea-level rise by 2095.

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