But it was the only method of commercial copying prior to the advent of carbon paper and typewriters.

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Then there are the quality-control issues: On one occasion "a Spanish producer printed our labels on old, horrible carbon paper, " recalls Hughes.

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Somewhere today there probably exists a company still using typewriters and carbon paper, but that organization is probably irrelevant to most of us.

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Secretaries made copies in triplicate, in case the project was uncovered, even using the typewriters and carbon paper of the Judenrat, the Jewish council set up by the Germans.

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The planning white paper puts carbon reductions at the heart of the planning process and obliges local councils to plan new buildings to optimise people's ability to walk or cycle to work.

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One is a carbon tax, which this paper has long advocated.

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To create his test, Jack mixed human mesothelin-specific antibodies with carbon nanotubes and coated strips of ordinary filter paper.

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Dr Lackner's version uses layers of Teflon or paper covered with a resin that absorbs carbon dioxide when dry and gives it up when moist.

ECONOMIST: Combating climate change

The Congressional Budget Office has just released a working paper evaluating the various ways that the effect of the carbon tax on low-income families might be offset.

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Lehmann, the lead author of the paper which is published in the journal Nature Geosciences, said that the black carbon content of soils in the study ranged from zero to 82 percent of soil organic carbon.

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