BY NEIL HAESLER, POSTMEDIA NEWSDECEMBER 4, 2010

When your doctor turns on the gas during surgery you go to sleep. You may be having pleasant dreams, but you are also contributing to global warming, according to a study released yesterday by the University of Copenhagen.

Each year, surgery-related gases affect the climate as much as one million cars, reports the study done in conjunction with NASA and the University of Michigan medical school.

Ole John Nielsen, a professor of atmospheric chemistry at the University of Copenhagen, carried out the study which examined three gases, isoflurane, sevoflurane and desflurane, used regularly in human medicine. Nielsen says all three are worse than C02.

Read Story ( Montreal Gazette)

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