The Pew Center on Global Climate Change provides a comprehensive list of actions taken at the state and regional level to address greenhouse gas reduction. The following list includes states that have set greenhouse gas reduction targets:
- Arizona – GHG reduction to 2000 levels by 2020; 50% below 2000 levels by 2040 (Executive Order 2006-13, 2006)
- California – GHG reduction to 1990 levels by 2020; 80% below 1990 GHG levels by 2050 (AB 32, 2006; Executive Order S-3-05, 2005)
- Colorado – 25% volumetric reduction in vehicle petroleum consumption by 2012; 20% GHG reduction below 2005 levels by 2020; 80% below 2005 levels by 2050 (Executive Order D-004-08, 2008)
- Connecticut – 10% GHG reduction below 1990 levels by 2020; 80% below 2001 levels by 2050 (HB 5600, 2008)
- Florida – GHG reduction to 2000 levels by 2017; 1990 levels by 2025; 80% below 1990 levels by 2050 (Executive Order 07-127, 2007)
- Hawaii – GHG reduction to 1990 levels by 2020 (Act 234, 2007)
- Illinois – GHG reduction to 1990 levels by 2020; 60% GHG reduction below 1990 levels by 2050 (Governor’s Climate Change Advisory Group, 2007)
- Maine – GHG reduction to 1990 levels by 2010; 10% GHG reduction below 1990 levels by 2020; 75-85% below 2001 levels in the “long term” (Act to Provide Leadership in Addressing the Threat of Climate Change, 2003)
- Maryland – 25% GHG reduction below 2006 levels by 2020; 80% below 2006 levels by 2050 (SB 278, 2009)
- Massachusetts – 10%-25% GHG reduction below 1990 levels by 2020; 80% below 1990 levels by 2050 (S.2540, 2008)
- Montana – GHG reduction to 1990 levels by 2020 (Western Climate Initiative, 2007)
- Minnesota – 15% GHG reduction below 2005 levels by 2015; 30% below 2005 levels by 2025; 80% below 2005 levels by 2050 (Next Generation Energy Act, 2007)
- New Hampshire – GHG reduction to 1990 levels by 2010; 10% GHG reduction below 1990 levels by 2020; 75-85% below 2001 levels in the “long term” (The New England Governors’ Climate Change Action Plan, 2001)
- New Jersey – GHG reduction to 1990 levels by 2020; 80% GHG reduction below 2006 levels by 2050 (A3301, 2007)
- New Mexico – 10% GHG reduction below 2000 levels by 2020; 75% below 2000 emissions levels by 2050 (Executive Order 2005-033, 2005)
- New York — 5% GHG reduction below 1990 levels by 2010; 10% below 1990 levels by 2020 (State Energy Plan, 2002)
- Oregon –10% GHG reduction below 1990 levels by 2020; 75% below 1990 levels by 2050 (HB 3542, 2007)
- Rhode Island – GHG reduction to 1990 levels by 2010; 10% GHG reduction below 1990 levels by 2020; 75-85% below 2001 levels in the “long term” (The New England Governors’ Climate Change Action Plan, 2001)
- Utah – GHG reduction to 2005 levels by 2020 (State Department of Environmental Quality, 2008)
- Vermont – 25% GHG reduction from 1990 levels by 2012; 50% by 2028; and (if practical) 75% by 2050 (Executive Order 07-05, 2005; S.259 [Act 168], 2006)
- Virginia – 30% GHG reduction below 2035 business-as-usual levels by 2025 (Executive Order 59, 2007)
- Washington – 25% GHG reduction below 1990 levels by 2035; 50% below 1990 levels by year 2050 (Executive Order 07-02, 2007; HB 2815, 2008); 18% VMT/capita reduction below business-as-usual projections by 2020; 30% by 2035; 50% by 2050 (HB 2815, 2008)