California lawmakers voted Sunday to phase out the sale and use of firefighting foam containing toxic chemicals that have been linked to cancer and have contaminated drinking water throughout the state. The measure, put forward by state Sen. Ben Allen (D-Santa Monica), requires municipal fire departments, chemical plants and oil refineries to gradually stop using the foam, replacing it with alternatives that don’t contain perfluoroalkyl and polyfluoroalkyl substances, a class of chemicals commonly known as PFAS.