The 90-day emergency orders immediate action to reduce the risk of contamination to the local population.
Without cutting down the forests, Mr Sato reckons there will be a permanent risk of contamination.
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Physicians have to formulate doses of the drug in a way that increases the risk of contamination.
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"Such a move would indicate they believe the risk of contamination outside the plant was extensive, " Tolbert wrote.
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The mice at NYU live in a super-clean environment, and those imported from other labs carry a risk of contamination.
Organic farmer Gerald Miles told the Today programme that he believes there is a risk of contamination to other wheat crops.
Mr Emmerson, representing Mr Litvinenko's family, said a number of locations were closed for several months as health agencies tried to contain the risk of contamination.
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Last year a group of organic and family farmers sued Monsanto over similar issues, saying the pervasiveness of genetically modified crops elevates the risk of contamination of their crops with patented GMO traits, and raises the risk they will be sued by Monsanto for patent infringement.
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It also recalled a brand of gummy candies sold in five of its stores amid the potential risk of metal contamination.
The design of the tools reduces the number of parts to be sterilized, reducing risk of cross-contamination and cost.
Thoroughly cooking eggs kills salmonella bacteria within, but there is still risk of cross-contamination if a food preparer doesn't properly wash kitchen utensils, such as whisks or spatulas, that came into contact with the raw eggs.
An airplane crash does not have the possibility of the continued risk of killing people by radioactive contamination or genetic mutation decades or even permanently into the future.
Shale-gas producers also face opposition from greens, who object to the industry's heavy water usage and a small risk that fracking could lead to contamination of aquifers and even to earthquakes.
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Contamination of what is billed as science-based risk assessment by activist researchers and by the precautionary principle has become a pervasive problem.
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"We are very aware that while the risk of infection from insulin pen re-use is extremely small, cross-contamination from an insulin pen is possible, " Finan said.
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