A California Appellate Court sided with the State of California and Center for Food Safety (CFS) on Thursday, affirming that Monsanto’s glyphosate pesticide can be listed as a known carcinogen under Proposition 65.

Monsanto’s lawsuit challenged the 2015 announcement by California’s Office of Environmental Health Hazard Assessment (OEHHA) that it intended to list glyphosate, the active ingredient in Monsanto’s herbicide, Roundup, under California’s landmark Proposition 65.

Proposition 65 requires notification and labeling of all chemicals known to cause cancer, birth defects or other reproductive harm, and prohibits their discharge into drinking waters of the state. CFS intervened in the case, defending the listing of glyphosate as a carcinogen and the public’s right to know when it is being exposed to cancer-causing chemicals.