A third round of United Nations negotiations in pursuit of the world's first treaty to control plastic pollution has drawn more than 500 proposals from those involved, participants said on the last day of the talks on Sunday. Some said the number of submissions represented progress, while campaign group Greenpeace said it was "chaos". The plastics industry, oil and petrochemical exporters, including Russia and Saudi Arabia, have said a global deal should promote recycling and re-use of plastic, but environmental campaigners and some governments say much less needs to be produced in the first place.