Diplomats at a United Nations conference in Busan, South Korea, failed to reach agreement on the world’s first treaty to tackle plastic pollution on Sunday. They said they would reconvene in future months to try again.

A summit many hoped would yield a landmark treaty to tackle a global plastic pollution crisis ended in disappointment after oil- and gas-producing countries pushed back on limiting production

Countries have deadlocked on a United Nations treaty on plastic pollution, according to The Associated Press. The treaty, with an aim of tackling worldwide plastic pollution, faced a hurdle due to negotiators not being able to get past the question of whether it should bring down the planet’s overall plastic while also having mandatory

During the late-night meeting, countries supportive of legal obligations to cut plastic pollution refused to accept a treaty limited to voluntary measures. The treaty must take action at each stage of a plastic item’s life cycle, they asserted. That includes reducing how much plastic is made.

Delegates from more than 170 countries attempting to negotiate a treaty to curb global plastic pollution ended a weeklong meeting in Busan early Monday without an agreement, pushing talks to another session next year.

Two Center for Coalfield Justice staff members have returned from Busan, South Korea, where world leaders and organizations gathered last week to hammer out details on a treaty to address the global crisis of plastic pollution.

About 200 nations couldn’t agree on a treaty to curb plastic pollution after two years of divisive negotiations, but said they made some progress and would reconvene the talks next year.

Delegates from close to 200 countries huddled for a week of marathon negotiations but came up short on delivering a treaty.

Many nations hope to reduce the half a billion tons of plastic made each year. But pushback from plastic and oil producers, and Donald Trump’s election, could scuttle an agreement.