Wal-Mart, the controversial retailing giant, is under investigation in the US over allegations it is trying to pass off non-organic foods as organic.
It has been accused of using misleading labelling that is "tantamount to consumer fraud" by an organic farming watchdog, the Cornucopia Institute. The body has handed its complaints to the US Department of Agriculture (Usda).
The Wisconsin Department of Agriculture, Trade and Consumer Protection is also conducting an investigation into whether Wal-Mart is placing "natural" produce on shelf space labelled as containing organic items.
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