California bans paraquat, highly toxic herbicide outlawed in more than 70 countries

State is US's largest user of pesticide that is virtually proven to cause Parkinson's disease

California is banning paraquat, a highly toxic, controversial herbicide used across millions of acres of American cropland.

Public health advocates characterize it as a deadly substance that is virtually proven to cause Parkinson's disease. It is already outlawed in more than 70 countries, including China, the UK and the EU. Yet in the US, the Environmental Protection Agency (EPA) reapproved it for use in 2021 and 2024.