In the late 1990s, John Durnell began using the weedkiller Roundup to help tend to the community spaces in his neighborhood in St. Louis.

The central issue in the Roundup case, filed by Missouri resident John Durnell, was who decides what should appear on a pesticide or insecticide label—and whether a federal law…

The Supreme Court ruled that Monsanto cannot be held liable under state laws for failing to warn consumers about the alleged cancer risks of its weedkiller Roundup on its label.