Negotiations for an international treaty against plastic pollution start this Saturday at UNESCO in Paris. If two camps clash - on the one hand the producing countries (USA, Japan, China or Saudi Arabia) and, on the other, a coalition of fifty States whose France in favour of binding measures and a limitation of the production of plastics - the many environmental NGOs will ensure their role as watchdogs.

The "real" discussions will begin on Monday and end on Friday around the drafting of a global treaty.