Environmentalists and Indigenous leaders held signs in front of the United Nations buildings in Geneva where talks for a global accord to end plastic pollution are taking place.

Microplastics found in Geneva’s air where negotiations continue for a global plastics treatyMarc Meier/Greenpeace

As nations began a second week of negotiations Monday for a global accord to end plastic pollution, an artist heaped piles of plastic garbage onto a large sculpture in front of the United Nations office.