In 2006, the state of California established a greenhouse gas emissions target for 2020. The legislation aims to improve energy efficiency and increase cost savings for California households. Creation of green jobs, reduced greenhouse gas emissions as well as increased investment in clean tech are expected.
Source: World Resources Institute (2011) A Compilation of Green Economy Policies, Programs, and Initiatives from Around the World. The Green Economy in Practice: Interactive Workshop 1, February 11th, 2011

Assembly Bill 32 (AB32), or the Global Warming Solutions Act of 2006, mandates that California reduce its greenhouse gas (GHG) emissions to 1990 levels by 2020. AB32 also directs the California Air Resources Board to begin developing discrete early actions to reduce GHG emissions while also preparing a scoping plan to identify how best to reach the 2020 limit. Other key requirements of AB32 include: adoption of a regulation requiring GHG reporting for industry; identification and adoption of regulations for discrete early actions that could be enforceable; adoption of a low carbon fuel standard; requirement that early voluntary reductions receive appropriate credit; and the establishment of an Environmental Justice Advisory and an Economic and Technology Advancement Advisory Committee.