Their meeting concludes Sunday or early Monday in Busan, South Korea, where many environmental organizations have also flocked to push for a treaty to address the volume of production and toxic chemicals used in plastic products.

Plastic is ubiquitous. Globally, around 400 million tonnes of new plastic are produced each year. Without improvements to laws, plastic production might increase by nearly 70 per cent by 2040. A deal

Global leaders meet in Busan to negotiate a legally binding treaty on plastic pollution, with input from experts and advocates.