SCIENTISTS at the University of Guelph in Ontario have developed genetically modified pigs whose manure has up to 75 per cent less phosphorus than other pigs, a development that could dramatically reduce environmental costs and hence the price of pig-meat. The pigs used in the programme are the offspring of three pigs who had an extra gene injected into their embryos in 1998, creating an enzyme in saliva allowing them to digest phosphorus in feed.

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