Police have clashed with protesters in France’s western port city of La Rochelle, where demonstrations have been taking place against plans to construct plastic-coated artificial water reservoirs. Roughly 4,000 demonstrators took to the streets, but the peaceful marches turned to unrest with shop fronts smashed and vehicles set on fire. Officers attempted to break up the marches by constructing barricades, throwing tear gas canisters and discharging water cannons. At least six people were arrested. Controversial ‘mega-basins’Protesters in La Rochelle are demonstrating against a project which w…