Questions local leaders ask

Climate superfund laws recover the costs of past and future climate change impacts and adaptation from the large companies that extracted and refined fossil fuels during a covered period in the past. The recovered costs are dedicated to paying for the state's climate impacts and related adaptation solutions.

Minnesota's bill is authored by Rep. Athena Hollins and Sen. Ann Johnson Stewart. In the 2026 session it was House File 3945 and Senate File 4126.

The bill does three things. First, it tasks the Minnesota Pollution Control Agency (MPCA) with calculating the costs Minnesota has incurred, or will incur, from climate change caused by greenhouse gas emissions during a covered period. Second, it assesses the largest fossil fuel companies for their share of those costs, based on their share of those past emissions. Third, it creates a fund, managed by the MPCA, that pays for both the costs of climate impacts and proactive adaptation and resilience projects.

Drought, flooding, wildfire smoke, extreme heat and other disasters are already costing Minnesota communities. We can prepare by investing in adaptation measures like flood prevention, stormwater management and urban forestry, but those solutions need public investment. The climate superfund asks the companies most responsible for the emissions behind these costs to pay a fair share, so the bill doesn't fall only on local taxpayers.

No. Carbon taxes apply to future emissions, usually with the goal of reducing them. The climate superfund looks only at past emissions and the damage they have caused.

No. The law recovers costs from past emissions. It does not set any rules for, or recover any costs from, future emissions, and it doesn't tell any business how to operate.

Yes. Climate superfund laws are modeled on the federal Superfund law, the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). Since 1980, that law has made parties responsible for hazardous substances at a site pay for government cleanup costs, damage to natural resources, certain health assessments, and cleanup where a site may present an imminent and substantial danger.

Yes. Vermont and New York have passed climate superfund laws and are implementing them. Legislatures in California, Connecticut, Hawaii, Illinois, Maine, Maryland, Massachusetts, New Jersey, Oregon, Rhode Island, Tennessee and Virginia have also considered climate superfund bills.

No. The Attorney General's climate deception lawsuit is based on consumer protection law. The climate superfund is a cost recovery law that assesses responsible parties for a share of the state's climate costs.

No. The bill assesses a one-time cost recovery payment on a small number of very large fossil fuel companies, based on their past emissions. Residents, local governments and utilities are not assessed.

The fund would pay for the direct costs of climate impacts, like disaster response and recovery, and for proactive adaptation projects, like disaster preparedness, flood mitigation, stormwater infrastructure and resilience centers. Add details on local government access once confirmed.

Local governments rely on FEMA for major disaster recovery and pre-disaster mitigation grants. Since 2025, that support has become less certain: FEMA has lost a large share of its staff, grant programs like BRIC have been cancelled and litigated, and 20 FEMA grants to Minnesota totaling more than $80 million were held back in early 2025. A state fund paid by the largest emitters is one way to meet growing preparedness needs without raising local levies.

Local governments regularly weigh in on state legislation that affects their budgets and services. This bill directly concerns how disaster and preparedness costs are paid. Your attorney or administrator can advise on your body's process, and our model resolution is a starting point.

The Minnesota Pollution Control Agency totals the costs of climate impacts and adaptation investments that have been, and will be, incurred because of greenhouse gas emissions during the covered period.

Other states expect costs between $5 billion and $75 billion. Costs to Minnesota are expected to be in the tens of billions of dollars.

The MPCA determines whether a company is a responsible party and its share. A responsible party is a company that extracted or refined fossil fuels, has done business in Minnesota, and is responsible for at least one billion metric tons of greenhouse gas emissions between 1995 and 2026. Each company's share of the cost equals its share of covered emissions. If a company's extraction or refining produced 18% of covered emissions, it would be responsible for 18% of the total cost.

Only companies that do business in Minnesota, extract or refine coal, petroleum products or fuel gases, and are responsible for at least one billion metric tons of emissions between 1995 and 2026. The law does not apply to utilities, which typically don't extract or refine fossil fuels.

It's roughly equivalent to:

• 112 billion gallons of gasoline consumed
• 1.1 trillion pounds of coal burned
• About one-sixth of U.S. emissions in a year
• About Japan's total emissions in 2024

No. A cost recovery assessment based on past contributions to greenhouse gas emissions won't be passed along in gasoline prices. Like other consumer goods, the price of gasoline is set by supply and demand.

Oil companies already charge the prices that maximize their profits. If a company raised its prices further, it would make less money, not more, because drivers would buy less gas.

No. The assessment affects neither supply (the cost of production) nor demand (what people are willing to pay). It is based entirely on past activity and adds no cost to future extraction or refining.

It is a one-time fixed cost, not a marginal cost. It doesn't go up or down based on how much oil is extracted, refined or sold going forward.

Companies are already charging the profit-maximizing price. Raising prices beyond it would reduce their profits because drivers would buy less gas.

Oil companies charge the profit-maximizing price, not the lowest possible price. They won't charge drivers less than drivers are willing to pay, so a fixed cost doesn't change the price.

No. The assessment applies only to very large, usually multinational, corporations with significant revenue. A one-time assessment in a single state would be a relatively small addition to their costs, and they are very likely to remain profitable.

No. The climate superfund covers costs from past activity. It isn't designed to lower fossil fuel use or emissions.

According to the National Oceanic and Atmospheric Administration, "climate attribution is a scientific process for establishing the principal causes or physical explanation for observed climate conditions and phenomena."

It is an established discipline built on decades of peer-reviewed international research dating to the 1990s, and its findings are foundational to the Intergovernmental Panel on Climate Change's assessments of the physical science of climate change.

Yes. The total adds up four things:

• The cost of past damages
• The cost of past adaptation investments
• The projected cost of future damages
• The projected cost of future adaptation investments

The law defines which costs count, including public infrastructure, emergency response, public health, natural resources, biodiversity, agriculture, economic development, flood preparedness and safety, housing, and other impacts the MPCA finds relevant. The MPCA researches, totals and reports these costs, and updates the total at least every four years.

The University of Minnesota's Minnesota CliMAT (Climate Mapping and Analysis Tool) is one of the best climate impact models in the country. It is public and provides temperature and precipitation projections down to a 4 km (2.5 mile) scale across the state.

Yes. In 2024, the Legislature commissioned a report from the MPCA on the projected costs of the adaptation and resilience measures Minnesota will need. Update with the report's release status.

Yes. Assigning responsibility requires knowing each very large producer's total emissions during the covered period. That information is publicly available at carbonmajors.org, built from each company's self-reported production data.

Yes. End-to-end attribution is a scientifically credible method for linking impacts to particular emitters. It models economic outcomes with and without a given company's emissions, using a counterfactual as a control.

The model links emissions to climate impacts like rising global temperatures and local extreme events, translates those into state-level changes, and applies an empirically derived damage function to estimate economic impacts. Running the model with and without one company's emissions shows the cost attributable to that company. This kind of evidence speaks to the "but for" test courts use to determine causation.

No. The law counts total greenhouse gases released between January 1, 1995 and December 31, 2026 by companies that extracted or refined coal, petroleum products or fuel gases and are responsible for more than one billion metric tons of emissions in that period. The damages and adaptation costs must be in Minnesota; the extraction, refining and emissions do not.

Yes. Both laws are being challenged in federal court by three sets of litigants: industry groups, a coalition of states, and the federal government. Unless courts intervene, both states can continue implementing their laws while the cases proceed.

In December 2024, the U.S. Chamber of Commerce and the American Petroleum Institute challenged Vermont's law as unconstitutional and preempted by the Clean Air Act. In May 2025, West Virginia and 23 other states joined in support of the challenge (Chamber of Commerce v. Moore, No. 2:24-cv-01513). Also in May 2025, the U.S. Department of Justice and the Environmental Protection Agency filed a separate challenge (U.S. v. Vermont, No. 2:25-cv-00463).

The Northeast Organic Farming Association of Vermont and the Conservation Law Foundation intervened to defend the law in both cases. The parties have asked the court to decide the cases without a trial. Both cases are in the U.S. District Court for Vermont, within the federal Second Circuit. Update with the outcome of the March 30, 2026 hearings.

In February 2025, West Virginia and 21 other states challenged New York's law in the Northern District of New York (West Virginia v. James, No. 1:25-cv-00168). Later that month, the U.S. Chamber of Commerce, the American Petroleum Institute, the National Mining Association and the Business Council of New York filed a separate challenge, which was transferred to the Northern District in September 2025 and consolidated with the states' case. In October 2025, New York asked the court to dismiss it.

In May 2025, the U.S. Department of Justice filed its own challenge in the Southern District of New York (United States v. New York, No. 1:25-cv-03656). The court declined to transfer the case and denied environmental groups' request to intervene. A motion for summary judgment has been briefed but not decided. Both New York districts are within the federal Second Circuit.

The claims in all of these cases are similar. They argue that climate superfund laws are, in effect, regulations of greenhouse gas emissions, and are therefore preempted by the Clean Air Act, which gives the EPA authority over those emissions.

They also raise constitutional arguments under the Commerce Clause, the Due Process Clause and the Takings Clause, claiming that assessing costs for activity that happened in other states burdens interstate commerce, and that assessing costs for past activity deprives companies of property without due process.

The preemption argument depends on whether courts accept the challengers' characterization of the laws as emissions regulations, or look at what the laws actually do. In Vermont's words, its law is a "valid exercise of [the State's] traditional authority to raise revenue, protect the health, safety, and welfare of [its] citizens, and mitigate environmental harms inside [its] borders," and it does "not conflict with federal law or policy, regulate fossil fuel emissions, or punish fossil fuel producers."

Climate superfund laws allocate costs; they don't regulate emissions, so the challenges should fail. Legal outcomes are never certain, and the Second Circuit has previously accepted a similar mischaracterization in a different climate case, but the laws rest on solid legal footing.

It's hard to say. Appeals to the Second Circuit and possibly the U.S. Supreme Court could take at least two more years. In the meantime, unless courts intervene, Vermont and New York can keep implementing their laws.

The challengers' arguments resemble those made by the defendants in Minnesota's climate deception case, brought by the Attorney General against the American Petroleum Institute, ExxonMobil and Koch Industries. Those defendants also argued the case was really an attempt to regulate emissions and should be dismissed. Minnesota courts disagreed: the Ramsey County District Court declined to dismiss the case, and the Court of Appeals affirmed.

In February 2026, the U.S. Supreme Court agreed to hear similar claims brought by Boulder County and the City of Boulder, Colorado, so a decision there could still affect Minnesota's case.