Executive Orders S-3-05 and B-30-15

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Executive Order S-3-05[1] is an Executive Order of the State of California signed by Governor Arnold Schwarzenegger in June 2005 that set greenhouse gas emissions reduction targets for the State of California and laid out responsibilities among the state agencies for implementing the Executive Order and for reporting on progress toward the targets.

Specifically, the Executive Order established these targets:

  • By 2010, reduce GHG emissions to 2000 levels
  • By 2020, reduce GHG emissions to 1990 levels
  • By 2050, reduce GHG emissions to 80 percent below 1990 levels

The first and second goals were enshrined into law by the legislation known as AB 32, or the Global Warming Solutions Act of 2006, which gave the California Air Resources Board broad authority to implement a market-based system (also known as cap-and-trade) to achieve these goals.

California Executive Order B-30-15 (April 2015, signed by Governor Jerry Brown)[2] added the intermediate target of:

  • By 2030, reduce GHG emissions to 40 percent below 1990 levels.

This intermediate target was codified into law by SB 32, which was signed into law by Governor Jerry Brown on September 8, 2016.[3] On July 17, 2017, the legislature passed a law that authorized the Air Resources Board to operate a cap and trade system to achieve these emissions reductions.[4]


  1. ^ California Executive Order S-3-05 (June 2005) http://gov.ca.gov/news.php?id=1861
  2. ^ California Executive Order B-30-15 (April 2015) http://gov.ca.gov/news.php?id=18938
  3. ^ Megreian, Chris; Dillon, Liam (8 September 2016). "Gov. Brown signs sweeping legislation to combat climate change". Los Angeles Times. Retrieved 21 July 2017. 
  4. ^ Megerian, Chris; Mason, Melanie (17 July 2017). "California Legislature extends state's cap-and-trade program in rare bipartisan effort to address climate change". Los Angeles Times. Retrieved 21 July 2017.