The US Supreme Court on Monday began hearing arguments from ExxonMobil and Suncor Energy in a case that could decide whether states may continue suing oil majors for climate‑related damage.

Legal arguments before the bench

Petitioners contend that the lawsuits, filed in courts across New York, New Jersey and Pennsylvania, overreach state authority and are pre‑empted by federal environmental statutes. They argue that the federal Clean Air Act gives the Environmental Protection Agency exclusive jurisdiction over greenhouse‑gas emissions, leaving no room for state‑level claims.

Representatives for the states counter that the federal law sets a floor, not a ceiling, and that states retain the right to seek compensation for the tangible harms they face – from rising sea levels to intensified wildfires. "The climate crisis is a public‑policy problem that states are uniquely positioned to address," a lawyer for New York told the Court, according to the Guardian.

US Supreme Court interior

Potential impact on oil liability

If the justices side with the oil companies, the ruling could curtail a wave of climate suits that collectively seek tens of billions of dollars in damages. Legal analysts note that a decision blocking the cases would set a precedent limiting future state actions, potentially shielding the industry from costly litigation for years to come.

Conversely, a rejection of the petition would affirm the states’ ability to pursue claims, opening the door for further actions against other major producers such as Chevron and BP. "A win for the plaintiffs would send a clear signal that corporations cannot hide behind federal pre‑emption when their activities cause real harm," said a climate‑policy expert at the University of California, Berkeley.

Background and precedent

The lawsuits stem from a 2020 filing in New York that alleges ExxonMobil and Suncor contributed significantly to global warming and failed to disclose the risks to investors. Similar actions have been brought in New Jersey, where a jury previously awarded $5 billion against oil firms, and in Pennsylvania, where a trial is set for later this year.

While some cases have been dismissed on procedural grounds, others have resulted in settlements. In 2023, ExxonMobil agreed to a $15 million settlement with the state of New York, without admitting wrongdoing. Those outcomes have emboldened other states to file suit, creating a patchwork of litigation that the oil industry says undermines regulatory uniformity.

Court composition and political context

The hearing comes as the Court’s conservative bloc, which includes Justice Samuel Alito – one of three justices appointed by former President Donald Trump – remains solidified. Recent reporting indicates Alito intends to stay on the bench even if Democrats regain control of the Senate, preserving the current ideological balance for the foreseeable future.

That stability means the nine‑member panel hearing the case is likely to split along ideological lines, with the three liberal justices expected to defend the states’ standing. The outcome, expected later this year, will be watched closely by climate advocates and the fossil‑fuel sector alike.

Beyond the courtroom, the decision could influence legislative efforts at the federal level, where Congress is debating a climate‑damage fund that would channel liability away from the courts. Lawmakers on both sides of the aisle have cited the Supreme Court’s pending ruling as a factor shaping their proposals.

For now, the justices will deliberate behind closed doors, and the nation awaits a verdict that could redefine corporate responsibility in the era of climate change.