Still, CARB says transportation is the source of most of California's carbon dioxide emissions, and carbon dioxide is one of seven greenhouse gases that the ARB is responsible for monitoring and regulating to help mitigate climate change. 35% of new vehicles sold in 2026 must be zero-emissions or plug-in hybrid electricĬalifornia already 'enjoys the largest zero-emission vehicle market in the nation with more than 16% of new vehicles sold being zero-emissions or plug-in hybrids,' according to the proposal.Here's how those quotas break down by year, according to the plan:
