Prop 65 warning labels turn 40, still baffling shoppers in California
California's Proposition 65, the 1986 law requiring warnings on products that may expose consumers to chemicals linked to cancer or reproductive harm, is marking its 40th anniversary this year even as many consumers remain confused by its labels. The law does not ban the chemicals in question but forces businesses to disclose their presence above certain thresholds, leaving buyers to decide for themselves whether to avoid a product.