Oil companies can be held legally liable for deceiving the public about the risks of climate change

What's this about?

People disagree about whether oil firms can face legal blame for tricking people about climate risks.

The answer is yes, in some cases, but the law does not blame every oil firm automatically.

What supporters say

• Laws that stop firms from tricking buyers can cover false or misleading climate ads.
• Studies that link harm to a source may help show how a firm’s actions caused damage.
• Company records may show leaders knew climate risks while sharing a different message outside.

What critics say

• Court rules may stop judges from hearing some cases, even before they study the main facts.
• One well-known case failed because the proof shown in court did not support the claim enough.

How to read this

The number of points on each side does not show who is right; strong proof matters more than a long list.

The bottom line

Oil firms can face legal blame for misleading climate claims, but each case needs clear proof.

The best case would show a false message, who heard it, why it mattered, and what harm followed.

Oil companies can potentially be held liable for misleading the public about climate risks, but the law does not create automatic or industry-wide responsibility. The strongest cases would involve specific, provably false statements aimed at identifiable audiences, backed by evidence of material harm.

The case for

Consumer-protection laws can cover climate-related marketing when companies make specific factual claims rather than vague promotional statements or protected opinions. That could include advertising or public communications that understate known risks, shift responsibility entirely onto individuals, or portray a company as climate-friendly while omitting important information. Litigation databases show that such claims are legally recognizable and are already being pursued. 1

Research has documented recurring patterns in fossil-fuel communications, including messages that emphasized uncertainty, delayed action, focused blame on consumers, or highlighted future technological solutions. These studies do not by themselves prove that a particular statement broke the law, but they provide evidence that can support a deception case (see Figure 2).

Evidence of what companies knew internally may also help plaintiffs show intentional deception. A peer-reviewed comparison of ExxonMobil’s internal climate projections with later observations found that many of the projections were broadly accurate. Other research has identified a gap between internal scientific knowledge and some external communications. That gap could support an argument that a later public statement was made despite contrary information (see Figure 1). 2

But knowledge alone is not enough. A plaintiff would still need to identify a particular false or misleading statement and show that it was legally important, covered by the relevant statute, and connected to reliance or injury.

Attribution science may strengthen some causation arguments by linking emissions or corporate conduct to a specific climate-related harm. Researchers say attribution evidence can help with issues such as standing and causation. It does not, however, independently prove deception, reliance, a legal duty, statutory coverage, or a compensable injury. 3

The case against

A prominent case shows how difficult these claims can be to prove. In *People v. Exxon Mobil*, the state alleged that the company misled investors about climate risks. The case failed at trial because the state did not prove the charged material misrepresentations or investor injury. The decision demonstrates that allegations, internal knowledge and disputed communications do not automatically establish liability. 4

Procedural and jurisdictional rules can also prevent courts from reaching the substance of a climate claim. Courts have raised questions involving federal jurisdiction, preemption, standing, political-question doctrine and causation. In *City of New York v. BP P.L.C.*, the Second Circuit rejected a federal common-law damages theory, finding that the claims raised predominantly federal and international concerns. 5

The existing record also does not establish a settled rule of general industry-wide liability. Many climate cases remain pending or have been resolved on procedural grounds, and the fact that a claim can be filed—or survives an early motion—does not mean the company will ultimately be found liable.

The legal route is strongest when a company made a precise statement to a clearly identifiable audience. It is weaker for broad advocacy, predictions, statements about uncertainty and advertising puffery. Courts would have to examine what was said, who heard it, whether it was misleading and material, what harm followed, and which law applies.

The bottom line

The evidence favours the limited claim that oil companies can be held legally liable in an appropriate case for actionable deception about climate risks. That conclusion is supported strongly by existing consumer-protection principles and by evidence showing that such claims are legally cognizable.

But the evidence is much weaker for predicting liability in any particular case, and it does not support automatic or industry-wide responsibility. Few final merits decisions have established liability for public climate-risk deception. The central unresolved question is whether evidence of corporate knowledge or broader messaging patterns can be tied to a specific, material misrepresentation that caused legally recognized harm.