Monsanto has demanded a retraction of the report has asked to meet with the WHO about its evaluation, Reuters reported

Health officials are raising new concerns about the most widely used herbicide in the world.

Earlier this month, the World Health Organizations International Agency for Research on Cancer announced findings that glyphosate, the main ingredient in Monsantos RoundUp line of pesticides, is probably carcinogenic to humans. The research, published in The Lancet Oncology, relies on studies conducted on the chemical over the last few decades.

Use of glyphosate which the EPA has deemed safe has soared in the last two decades with the introduction of crops genetically engineered to withstand the herbicide. Glyphosate is also a main ingredient in a new product called Enlist Duo recently introduced by Dow Chemical.

Monsanto vice president of global regulatory affairs Philip Miller told Reuters that the company questioned the quality of the assessment.

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