Big Oil Faces Rising Tide of Climate Litigation

The report, "Big Oil in Court," co-authored by Oil Change International and Zero Carbon Analytics, highlights a sharp shift in legal tactics. While cases once focused primarily on compliance, they now frequently target misleading advertising and direct climate damages. Over half of these filings have originated in the United States, with a significant secondary concentration in Western Europe. Last year set a record for the industry, with 14 new cases initiated worldwide.

Damages claims are currently the most prevalent, rising from only three filings before 2017 to 30 since that year. In the U.S., the City and County of Honolulu v. Sunoco et al. remains the most advanced case, though it faces heavy industry opposition. Internationally, the legal battle involving Peruvian farmer Saúl Luciano Lliuya, who sued the energy giant RWE over glacier melting, serves as a prominent example of individual plaintiffs seeking restitution for climate-related infrastructure costs. While advertising-focused suits have seen some success—with companies frequently losing or retracting claims—experts like Michael Gerrard of Columbia University note that broader damages cases have yet to secure a definitive breakthrough in the courtroom.