Statewide Survey PPIC Statewide Survey: Californians and the Environment By Mark Baldassare, Dean Bonner, Lunna Lopes, David Kordus Jul 26, 2017 Strong majorities of California adults (72%) and likely voters (66%) favor the new state law mandating reductions in greenhouse gas emissions; 56% of adults and 49% of likely voters support the state’s cap-and-trade program.