France will vote against renewing the European license for weedkiller glyphosate, an official at the environment ministry said Wednesday, adding to uncertainty over the future of widely-used products such as Monsanto's Roundup in the European Union. Concerns over glyphosate's risk to human health have prompted investigations by U.S. congressional committees and delayed a relicensing decision in the EU."France will vote against the re-authorization of glyphosate due to the doubts that remain about its dangerousness," a ministry official said.The European Commission, the EU executive, has proposed extending approval for glyphosate by 10 years after the European Chemical Agency (ECHA) said in a study in March it should not be classified as a cancer-causing substance.