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2017-03-31 |
New York v. DOE |
Climate Change Mitigation, Energy |
Lawsuit vs. Federal Government |
Multi-state lawsuit challenging the federal government’s decision to delay the effective dates of final rules governing energy efficiency for six products.
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California, Connecticut, Illinois, Maine, Maryland, Massachusetts, New York, Oregon, Pennsylvania, Vermont, Washington |
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2017-03-13 |
Alliance of Automobile Manufacturers v. EPA |
Climate Change Mitigation |
Defense of Federal Standards |
California and Connecticut intervened in lawsuit challenging EPA’s determination to retain existing GHG emission standards for light-duty vehicles.
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California, Connecticut |
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2016-10-27 |
Connecticut v. Hyundai Motor Co. |
Air Pollution, Climate Change Mitigation |
Lawsuit vs. Private Actors |
Multi-state settlement of consumer-protection claims against car manufacturers that overstated their vehicles’ fuel efficiency.
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Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Massachusetts, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, Tennessee, Texas, Virginia, Washington, Wisconsin |
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2016-08-15 |
North Dakota v. EPA (methane) |
Air Pollution, Climate Change Mitigation |
Defense of Federal Standards |
Twelve states joined in defense of EPA’s new source performance standards for methane and VOC emissions from the oil and gas sector.
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California, Connecticut, Illinois, Maryland, Massachusetts, New Mexico, New York, Oregon, Rhode Island, Vermont, Washington |
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2016-05-18 |
Green 20 State AG Coalition |
Climate Change Mitigation |
Other |
Group of 17 state AGs and Former Vice President Al Gore announced a coalition of states committed to taking creative steps to combat climate change, including investigations into fossil fuel companies and climate-related disclosures.
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California, Connecticut, District of Columbia, Illinois, Iowa, Maine, Maryland, Massachusetts, Minnesota, New Mexico, New York, Oregon, Rhode Island, U.S. Virgin Islands, Vermont, Virginia, Washington |
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2016-04-29 |
American Fuel & Petrochemical Manufacturers v. O’Keeffe |
Climate Change Mitigation |
Defense of State Rule |
Oregon, California, and Washington joined in defense of Oregon’s Low Carbon Fuel Standard.
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California, Oregon, Washington |
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2015-11-20 |
Comments on Tennessee Pipeline Gas Go. Northeast Energy Direct Project |
Climate Change Mitigation, Energy, Environmental Assessment |
Administrative Proceeding |
Massachusetts AG submitted comments to Federal Energy Regulatory Commission and a study opposing a proposed natural gas pipeline that would have run through New England.
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Massachusetts |
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2015-11-03 |
West Virginia v. EPA |
Climate Change Mitigation |
Defense of Federal Standards |
Multi-state intervention to join EPA’s defense of Clean Power Plan against challenge mounted by other states and industry petitioners.
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California, Connecticut, Delaware, District of Columbia, Hawaii, Illinois, Iowa, Maine, Maryland, Massachusetts, Minnesota, New Hampshire, New Mexico, New York, Oregon, Rhode Island, Vermont, Virginia, Washington |
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2015-10-23 |
North Dakota v. EPA (Power Plants) |
Climate Change Mitigation |
Defense of Federal Standards |
Multiple states joined as defendant-intervenors in support of EPA in lawsuit challenging New Source Performance Standards (NSPS) for carbon dioxide emissions from new and modified power plants.
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California, Connecticut, Delaware, District of Columbia, Hawaii, Illinois, Iowa, Maine, Maryland, Massachusetts, Minnesota, New Hampshire, New Mexico, New York, Oregon, Rhode Island, Vermont, Virginia, Washington |
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2014-06-23 |
Utility Air Regulatory Group v. EPA |
Climate Change Mitigation |
Defense of Federal Standards |
Multiple states intervened in lawsuit to defend EPA rules concerning regulation of greenhouse gas emissions from stationary and mobile sources.
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California, Connecticut, Delaware, Illinois, Iowa, Maine, Maryland, Massachusetts, Minnesota, New Hampshire, New Mexico, New York, North Carolina, Oregon, Rhode Island, Vermont, Washington |
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2013-08-08 |
Agreement for DOE to Update Energy Efficiency Standards |
Climate Change Mitigation, Energy |
Administrative Proceeding |
Multi-state coalition reached agreement with U.S Department of Energy establishing timetable for updating federal efficiency standards for energy-intensive consumer products.
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Connecticut, Maine, Maryland, Massachusetts, New York, Oregon, Rhode Island, Vermont, Washington |
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2012-12-11 |
Request for Performance Standards and Guidelines for Methane Sources |
Climate Change Mitigation |
Regulatory petition |
Multi-state request for EPA to issue methane standards under the Clean Air Act.
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Connecticut, Delaware, Maryland, Massachusetts, New York, Rhode Island, Vermont |
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2012-01-25 |
Cleveland National Forest Foundation v. San Diego Association of Governments |
Climate Change Mitigation, Environmental Assessment |
Lawsuit v. Other Public Entity |
California AG intervened in a suit attempting to require the San Diego Association of Governments (SANDAG) Regional Transportation Plan to consider climate change in its long term planning decisions.
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California |
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2011-06-20 |
American Electric Power v. Connecticut |
Climate Change Mitigation |
Lawsuit vs. Private Actors |
Federal common law nuisance claim against five major electric power companies for their contribution to climate change through greenhouse gas emissions.
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California, Connecticut, Iowa, New Jersey, New York, NYC, Rhode Island, Vermont, Wisconsin |
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2010-06-07 |
Coalition for Responsible Regulation v. EPA (2010) |
Climate Change Mitigation |
Defense of Federal Standards |
Multiple states moved to intervene in litigation concerning the 2012–2016 light duty motor vehicle emissions standards.
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California, Delaware, Illinois, Iowa, Maine, Maryland, Massachusetts, New Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Washington |
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2009-06-25 |
Defense of California Feed-in-Tariff Program |
Climate Change Mitigation, Energy |
Administrative Proceeding, Defense of State Rule |
California AG filed brief with the California Public Utility Commission defending the state’s authority to use feed-in tariffs.
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California |
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2008-08-25 |
New York v. EPA |
Climate Change Mitigation |
Lawsuit vs. Federal Government |
Multi-state action against EPA for failure to set NSPS standards for oil refineries.
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California, Connecticut, Delaware, Maine, Massachusetts, New Hampshire, New Mexico, New York, Oregon, Rhode Island, Vermont, Washington |
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2007-12-11 |
Central Valley Chrysler-Jeep, Inc. v. Goldstene |
Climate Change Mitigation |
Defense of State Rule |
State AGs intervened in lawsuit to defend California’s greenhouse gas emission standards for motor vehicles against challenge alleging that the standards are preempted by the Energy Policy and Conservation Act (EPCA).
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California, Connecticut, Maine, Massachusetts, New Jersey, New York, Oregon, Rhode Island, Vermont, Washington |
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2007-08-28 |
California v. County of San Bernardino |
Climate Change Mitigation, Environmental Assessment |
Lawsuit v. Other Public Entity |
The State of California entered into a landmark climate change settlement with San Bernardino County setting forth a specific greenhouse gas reduction plan.
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California |
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2007-04-02 |
Massachusetts v. EPA |
Climate Change Mitigation |
Lawsuit vs. Federal Government |
Multi-state challenge to EPA denial of petition to regulate greenhouse gas emissions from motor vehicles under Clean Air Act.
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California, Connecticut, District of Columbia, Illinois, Maine, Massachusetts, New Jersey, New Mexico, New York, Oregon, Rhode Island, Vermont, Washington |
