The California legal system has determined that Roundup causes cancer. See, for example, “$2 Billion Verdict Against Monsanto Is Third to Find Roundup Caused Cancer” (nytimes):
The jury, in state court in Alameda County, reached its verdict two months after a federal jury in San Francisco awarded $80 million to a man who claimed that Roundup had caused his non-Hodgkin’s lymphoma. In August, a state court in San Francisco found that Roundup had caused the cancer of a school groundskeeper, awarding him $289 million. A judge reduced that figure to $78 million.
Yet the German owners of Monsanto (safe to assume they wish they’d spent their hard-earned dollars in some other country?) still make the stuff and Amazon still sells it (example). Glyphosate from a variety of manufacturers is available at Home Depot.
How are the retailers immune from liability? If we have faith in our legal system to come up with correct answers to scientific questions, such as “Does glyphosate cause cancer?” then why are millions of Americans apparently still buying and using it?