Chemical used in weedkiller is a ' probable human carcinogen ' , experts say . Glyphosate is most commonly used in popular weedkiller products . Firm that manufactures the product strongly influences experts ' opinions .
Chemical used in weedkiller is a 'probable human carcinogen ' , experts say . Glyphosate is most commonly used in popular weedkiller Roundup . Firm that produces the product strongly disputes scientists ' findings .