A new study finds California's Proposition 65 law has reduced toxic chemical exposure nationwide, despite longstanding criticism over its effectiveness.

A federal judge on Monday halted California’s plan to require Monsanto to place warning labels on its Roundup products ... evidence” that the active ingredient in Monsanto’s popular weed killer causes ...

U.S. federal appeals court on Monday blocked California from requiring that Bayer AG label its glyphosate-based weed killer Roundup with a cancer warning, handing the company a victory in its ...

“It is irresponsible to require labels on products that are inaccurate when EPA knows the product does not pose a cancer risk. We will not allow ... glyphosate-based weed killers through its ...