Guyana — Guyana Environmental Protection Agency & Ketanji Brown Jackson

Guyana — Guyana Environmental Protection Agency: The Guyana — Guyana Environmental Protection Agency's determination that glyphosate is 'unlikely to be a human carcinogen' and its approval of Roundup's label without a cancer warning were central to the Supreme Court's decision, which upheld federal preemption over state-level warning requirements.

Ketanji Brown Jackson: Justice Ketanji Brown Jackson filed a dissenting opinion, arguing that the majority misunderstood FIFRA's requirements and that Durnell's claim should not be preempted, leaving him without a remedy.