Yet that limit is regularly exceeded.

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But there is a limit to the ability to substitute quality for quantity, and the U.S. has exceeded that limit.

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After reporting concern about contamination, water quality tests performed by the Texas Railroad Commission found naturally-occurring levels of benzene, a known carcinogen, which exceeded the threshold limit for drinking water, but found no evidence to support a flaming water claim.

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Mr Pritchard-Jones said he believed she might have exceeded a 10mph speed limit going into a bend on the road.

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Lanner council had argued that Cornwall Council's decision to approve the 25 homes exceeded its own recommended limit of 12 homes for rural areas.

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"In keeping with the applicable rules ... he again exceeded the 40-second time limit by a considerable margin, " Ridley said in a statement.

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However, Japanese regulations have a lower limit for women, and the female worker in question exceeded that threshold three time over.

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The Icelandic Central Bank said that for nearly a quarter of all households in the country, the total debt service for mortgages, car loans and overdraft loans had exceeded 40% of disposable income, commonly considered the "danger limit" for total debt service.

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This means that the two-degree limit which current negotiations want to (but won't) put on climate change will in all likelihood be exceeded.

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