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.

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

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.

The United Nations' environment chief insisted on Monday that talks on a landmark plastic pollution treaty were not a failure, saying important progress was made despite negotiations collapsing without an agreement.

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.

Plastic pollutes oceans, food, your body. Yet nations are divided over a global treaty. Why all eyes are on talks for a U.N.-led accord to cut plastic waste.

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.