The government will submit a landmark international treaty banning the production and use of the world's most toxic and harmful chemicals to the Diet for ratification early next year, government sources said Thursday.

The Stockholm Convention on Persistent Organic Pollutants, which was adopted in late May, after three years of hectic negotiations, will be presented to a 150-day ordinary Diet session that will open in late January, the sources said.

The Stockholm Convention bans the production and use of 12 persistent organic pollutants, or POPs, and calls for reductions in the emissions of the chemicals.