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19 May - 12:55 pm NZ
Updated at 10:54 am on 8 May 2012
Vegetable sellers in China are reported to have been caught spraying cabbages with a formaldehyde solution to keep them fresh in transit.
Formaldehyde is a toxic cancer-causing compound.
The Xinhua news agency says the practice has been common in eastern China for several years, as most farmers can't afford refrigerated trucks.
Copyright © 2012, Radio New Zealand
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