German Environment Minister Steffi Lemke plans to travel to Ottawa on Saturday for UN talks on a global plastic pollution treaty, her ministry announced in Berlin on Tuesday. On Sunday, Lemke is to hold talks with her Canadian counterpart Steven Guilbeault ahead of the fourth session of the UN’s intergovernmental negotiating committee on the issue. Canadian Prime Minister Justin Trudeau is to open the conference on Monday. The UN talks are aimed at a fresh attempt at a legally binding international treaty on reducing plastic waste, including in the marine environment, to be agreed by the end o…