On March 2, 2022, delegates to the UN environment assembly adopted an ambitious resolution to develop the text of a new treaty by the end of 2024 to end plastic pollution. With 24 days of formal negotiation between almost 200 countries completed, spread over meetings in Peru, France, Kenya and Canada, the fifth and final negotiation meeting is about to take place in Busan, South Korea. This is crunch time. Agreement must be found or the opportunity to take global action to tackle plastic pollution might be lost.