US Supreme Court weighs limits on glyphosate lawsuits over Roundup cancer claims

The United States Supreme Court heard oral arguments on whether federal law preempts state-law lawsuits alleging cancer risks from glyphosate-based herbicides, including Roundup. The cases—Monsanto v. Durnell and related actions—center on whether consumers can sue manufacturers for failing to warn about cancer risks associated with glyphosate, a pesticide used in Roundup and other products.

Justices questioned whether federal pesticide regulation should shield manufacturers from certain state claims or whether state tort actions can proceed despite regulatory framework. The discussions focused on the concept of preemption and how it would affect litigation challenging health effects such as cancer linked to glyphosate.

The proceedings highlight ongoing disputes over liability for glyphosate-based herbicides and may influence future cases against Monsanto and similar makers.