Negotiators aiming for an international treaty to curb plastic pollution are set for fierce debate on the last day of scheduled talks, as over 100 countries supportive of a pact that would cap plastic production face off against a handful of oil-producing countries who want it focused just on waste.

The world’s nations will wrap up negotiating a treaty this weekend to address the global crisis of plastic pollution.

The global production of plastic has reached almost half a billion tonnes each year, more than double the amount produced 20 years ago. Several countries are now holding talks in South Korea’s Busan f