(NewsNation) — In the aftermath of the Cold War, the U.S. and Russia had agreed to multiple non-nuclear proliferation agreements.

Out of eight nuclear arms control agreements between Russia and the U.S., only one is still in effect. That is the new Strategic Arms Reduction Treaty or “New START.”

The treaty limits nuclear warheads to 1,550 and limits the number of launchers and delivery systems. President Joe Biden and Russian President Vladimir Putin extended this deal in February of last year. It will be in effect until 2026.

But New START doesn’t cover the thousands of battlefield nuclear weapons. Those are less deadly nuclear weapons that could still kill thousands of people.

Notably, Ukraine actually had its own nuclear missiles until 1994 when the country agreed to give all its weapons to Russia in exchange for security assurances, which leaders say were violated by the 2014 invasion of Crimea.

This comes as top NATO leaders say any chemical attack by Russia on Ukraine would change the course of the war, but they are not saying whether NATO would take military action.

Russia and Ukraine are set to meet for peace talks Tuesday. Ukraine could declare neutrality and offer security guarantees to Russia to secure peace “without delay,” President Volodymyr Zelenskyy said .

A new NewsNation/Decision poll of more than 1,000 registered voters found that nearly half of those surveyed are very concerned about the use of chemical warfare in future conflicts. Less than 2% are not at all concerned.

You can read the full NewsNation poll here.