OTTAWA, Ontario (AP) — For the first time, negotiators from most of the world’s nations are discussing the text of what is supposed to become a global treaty to end plastic pollution.

Delegates and observers at the Intergovernmental Negotiating Committee on Plastic Pollution called it a welcome sign that talk has shifted from ideas to treaty language at this fourth of five scheduled plastics summits.

Most contentious is the idea of limiting how much plastic is manufactured globally. Currently, that remains in the text over the strong objections of plastic-producing countries and companies and oil and gas exporters. Most plastic is made from fossil fuels and chemicals.

The Ottawa session was scheduled to end late Monday or early Tuesday. On Monday night there could sharp discussion over whether this question of plastic production is a focus for working groups before the next and final meeting.