Most approaches to Red and Green (labour and environmentalist) alliances have taken Marxian perspectives, to the exclusion of anarchism and libertarian socialism. Recent developments, however, have given voice to a ’syndical ecology’ or what some within the Industrial Workers of the World (IWW) call ’green syndicalism’. Green syndicalism highlights certain points of similarity between anarcho-syndicalism (revolutionary unionism) and radical ecology. These include, but are by no means limited to, decentralisation, regionalism, direct action, autonomy, pluralism and federation. The article discusses the theoretical and practical implications of syndicalism made green.