This document summarizes issues related to California's Proposition 65 law, which requires warnings for chemicals known to cause cancer or reproductive toxicity. It discusses controversies over chemicals recently classified by IARC like glyphosate and processed meats. It also covers Maillard reaction products like acrylamide and 4-MEI that are present in various heated foods. Additionally, it outlines IARC's future priorities that could impact Prop 65 listings and lessons for minimizing threats from potential listings.