Requires CalRecycle to adopt regulations reducing plastic waste, including to: (1) require that single-use plastic packaging, containers, and utensils be reusable, recyclable, or compostable, and to reduce such waste by 25%, by 2030; (2) prohibit polystyrene container use by food vendors; and (3) tax producers of single-use plastic packaging, containers, or utensils by January 1, 2022, and allocate revenues for recycling and environmental programs, including local water supply protection. Prohibits Legislature from reducing funding to specified state environmental agencies below 2019 levels. Summary of estimate by Legislative Analyst and Director of Finance of fiscal impact on state and local governments: State revenue from new tax on singl...