EU: Protesters call for a ban of weed-killer chemical glyphosate Protesters outside the European Commission called for the banning of glyphosate on Wednesday, as member states inside debated whether to renew the European licence for the herbicide used in the Monsanto weed-killer 'Roundup'. Protesters and a range of scientists say the chemical is carcinogenic, though the EU's chemical agency disagrees. IMAGES AND SOUNDBITES