EPA should revoke Monsanto weed killer approval, groups tell U.S. court

(Reuters) - Environmental groups argued in federal appeals court on Wednesday the U.S. Environmental Protection Agency failed to analyse the risks Bayer AG Monsanto's dicamba-based weed killer posed to nearby crops before approving it in 2016.The groups, which filed a lawsuit in February, want the court to force the EPA to vacate its approval of XtendiMax, arguing it not only harms nearby crops and plants but wildlife as well. It is not clear whether the court has the authority to revoke an EPA..