California Environmental Quality Act, Greenhouse Gas Regulation and Climate Change

California has adopted the most significant climate change policies in the United States, including landmark legislation (AB 32)2 to lower state green- house gas (GHG) emissions to 1990 levels by 2020. Proposed new laws, and recent judicial decisions concerning the analysis of GHG impacts under the California Environmental Quality Act (CEQA), may soon increase the state's legally mandated GHG reduction target to 80 percent below 1990 levels by 2050.3 The purpose of California’s GHG policies is to reduce the concentration of human-generated GHGs in the atmosphere. The United Nations Intergovernmental Panel on Climate Change (IPCC) and many other scientific organizations have predicted that higher GHG atmospheric concentrations generated by human activity could cause catastrophic climate changes.

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