The Paraquat formulation already is banned in more than 40 countries, including Switzerland, the home country of agrochemicals giant Syngenta, the main manufacturer of it.

NPR: Nations Agree To New Chemical Ban, Export Controls

Guatemala and India were opposed to adding the Paraquat formulation.

NPR: Nations Agree To New Chemical Ban, Export Controls

But participants fell short in their efforts to require more information and consent among nations trading in a construction material, Chrysotile asbestos, and a formulation of the powerful herbicide, Paraquat, despite support from most of the 169 nations represented at the two-week U.N. summit.

NPR: Nations Agree To New Chemical Ban, Export Controls