Deep dive: Climate litigation & legal action — the hidden trade-offs and how to manage them

Why It Matters

Climate litigation has become one of the fastest-growing frontiers of environmental accountability. By mid-2025, cumulative climate-related lawsuits worldwide exceeded 2,666 cases across 55 jurisdictions, with more than 230 new filings in 2024 alone (Grantham Research Institute, 2025). Roughly 58 percent of completed cases have delivered outcomes favorable to climate action (UNEP, 2024). These numbers underscore a structural shift: legal systems are increasingly being used as levers to compel emission reductions, mandate disclosure, and reshape corporate strategy. Yet every case filed carries hidden trade-offs. Adverse precedents can entrench polluter protections, prolonged litigation drains the resources of claimants and defendants alike, and cases that reach settlement often yield opaque terms that fail to generate the public accountability advocates seek. For sustainability professionals, understanding these dynamics is essential to managing legal risk, allocating advocacy budgets, and turning litigation from a blunt instrument into a precision tool.

Key Concepts

Duty of care and human rights framing. Many landmark climate cases rest on the argument that governments and corporations owe a duty of care to present and future generations. The Dutch Supreme Court affirmed this principle in Urgenda Foundation v. State of the Netherlands, requiring the government to cut emissions by at least 25 percent by 2020. Human rights framing has since expanded the legal toolkit: the European Court of Human Rights ruled in KlimaSeniorinnen v. Switzerland (2024) that states violating climate targets can breach the right to private and family life under Article 8 of the European Convention on Human Rights (ECHR, 2024). This framing unlocks powerful remedies but also creates jurisdictional complexity when human rights standards differ across borders.

Corporate accountability vs. greenwashing claims. A growing share of cases targets private companies directly. Actions fall into two buckets: emissions-based claims that seek to hold fossil fuel producers liable for their contribution to cumulative greenhouse gas concentrations, and greenwashing claims that challenge misleading sustainability marketing. In 2024, greenwashing cases accounted for roughly one in five new corporate climate filings (ClientEarth, 2025). While greenwashing suits are easier to prove on the merits, they typically yield injunctive relief or fines rather than structural emission cuts.

Precedent risk and the double-edged sword. Every case that reaches judgment creates precedent. Favorable rulings, such as the Milieudefensie v. Shell decision ordering 45 percent absolute emission cuts by 2030, can catalyze industry-wide change. But unfavorable decisions can have lasting effects: the U.S. Supreme Court's West Virginia v. EPA ruling (2022) constrained the federal government's regulatory authority under the "major questions doctrine," limiting agency-driven climate policy for years. Claimants must weigh the probability of a favorable outcome against the risk of generating binding adverse precedent.

Standing and justiciability. Standing requirements remain a major gatekeeper. Claimants must demonstrate concrete, particularized harm traceable to the defendant's conduct. In Juliana v. United States, the Ninth Circuit dismissed the youth plaintiffs' claims in part because the requested relief was deemed beyond judicial competence. These procedural barriers mean that case selection requires as much strategic analysis as substantive legal research.

Costs and time horizons. Climate cases are expensive. Multi-year proceedings against well-resourced defendants can cost millions. A 2025 analysis by the Sabin Center for Climate Change Law at Columbia University found that the average duration of a climate liability case from filing to final resolution was 4.7 years (Sabin Center, 2025). For NGOs and public interest litigators, these timelines represent significant opportunity costs.

What's Working and What Isn't

Gains. Human rights and constitutional framing has proven remarkably effective. The KlimaSeniorinnen ruling established that elderly women could challenge Swiss climate policy as a violation of their right to health and private life, the first time the ECHR directly linked climate inaction to human rights obligations (ECHR, 2024). In the corporate sphere, the Shell decision in the Netherlands demonstrated that courts can impose binding, forward-looking emission reduction targets on private companies. Strategic litigation by organizations such as ClientEarth, which brought fiduciary duty arguments against the board of Shell, has forced companies to publicly justify transition plans in ways that voluntary disclosure regimes never achieved. Greenwashing enforcement has also accelerated: the Australian Federal Court's penalty against Santos in 2024 for misleading "clean energy" claims sent a clear signal to the extractives sector (ASIC, 2024).

Gaps and risks. Despite high-profile wins, the majority of climate cases globally still concern government rather than corporate defendants, meaning private sector accountability remains incomplete. In the United States, the fossil fuel liability cases brought by cities and states have been mired in procedural battles over federal vs. state jurisdiction for over seven years, with no trial on the merits yet concluded as of early 2026 (Sabin Center, 2025). Settlement agreements, while sometimes substantial in financial terms, frequently include non-disclosure provisions that limit their value as public precedent. The costs of litigation also create access-to-justice gaps: smaller NGOs and Global South communities often lack the resources to sustain multi-year proceedings, even when they face disproportionate climate impacts. There is also a growing trend of corporate counter-litigation and strategic lawsuits against public participation (SLAPPs), which can chill future climate advocacy.

Key Players

Established Leaders

• ClientEarth — Europe's leading environmental law NGO, with active cases against fossil fuel companies, financial institutions, and government bodies across multiple jurisdictions.
• Urgenda Foundation — Dutch organization behind the landmark Urgenda v. Netherlands case that established government duty of care on emissions.
• Sabin Center for Climate Change Law (Columbia University) — Maintains the Global Climate Change Litigation Database tracking 2,666+ cases worldwide.
• Grantham Research Institute (LSE) — Produces the annual Global Trends in Climate Change Litigation report informing policy and academic research.

Emerging Startups

• Climate Rights International — Founded in 2024 by former Human Rights Watch leaders to investigate fossil fuel industry human rights abuses related to climate change.
• Redo — Legal-tech platform using AI to analyze climate disclosure filings and identify potential greenwashing claims for institutional investors.
• Pollination — Climate advisory and investment firm that supports litigation-adjacent strategy for companies seeking to preemptively address legal risk.

Key Investors/Funders

• European Climate Foundation — Major funder of strategic climate litigation in Europe.
• ClimateWorks Foundation — Supports legal and policy advocacy organizations globally.
• Children's Investment Fund Foundation (CIFF) — Funds youth-led climate litigation and rights-based legal strategies.

Examples

Milieudefensie v. Royal Dutch Shell (Netherlands). In May 2021, The Hague District Court ordered Shell to reduce its absolute CO2 emissions by 45 percent by 2030 compared to 2019 levels, covering Scope 1, 2, and 3. Shell appealed, and the Appeals Court hearing concluded in late 2025 with a decision expected in early 2026. Regardless of outcome, the case transformed how multinational oil companies communicate transition strategies. Shell accelerated its divestment from Nigerian onshore assets and published a revised Energy Transition Strategy partially in response to litigation pressure (Milieudefensie, 2025). The trade-off: the multi-year appeal process has delayed enforceable relief while Shell continues upstream investments, demonstrating how appellate timelines can dilute the urgency of trial court victories.

Held v. State of Montana (United States). In August 2023, a Montana state court ruled in favor of 16 youth plaintiffs, finding that the state's environmental policy act provision barring consideration of climate impacts was unconstitutional. The decision marked the first U.S. youth climate trial victory on the merits (Our Children's Trust, 2023). Montana appealed to the state Supreme Court, with oral arguments heard in mid-2025. The case illustrates the trade-off between symbolic legal victories and enforceable policy outcomes: while the trial court ruling attracted global media attention, the state has continued issuing fossil fuel permits during the appeal.

Santos greenwashing enforcement (Australia). In 2024, the Australian Securities and Investments Commission secured penalties against Santos Limited after the Federal Court found the company's annual report claims about "clean energy" and a pathway to net-zero by 2040 were misleading (ASIC, 2024). The ruling required corrective disclosures and imposed financial penalties. The case set a precedent for securities regulators worldwide, demonstrating that greenwashing in mandatory filings, not just advertising, can trigger enforcement action. The trade-off: penalties were modest relative to Santos's revenue, raising questions about whether financial sanctions alone provide sufficient deterrence.

KlimaSeniorinnen v. Switzerland (ECHR). In April 2024, the European Court of Human Rights ruled that Switzerland violated the right to private life by failing to take adequate measures to mitigate climate change. The case was brought by a group of elderly Swiss women who argued their health was directly threatened by extreme heat events exacerbated by climate change (ECHR, 2024). The ruling obligated Switzerland to adopt measurable emission reduction targets aligned with the Paris Agreement. The trade-off: while the ruling applies to all 46 Council of Europe member states, enforcement depends on individual government compliance, and the Court has limited mechanisms to compel implementation.

Action Checklist

• Conduct a climate litigation risk assessment. Map your organization's exposure to emissions-based liability, greenwashing claims, and fiduciary duty challenges across all operating jurisdictions.
• Audit public climate claims. Review annual reports, sustainability reports, and marketing materials for statements that could be challenged as misleading under securities law or consumer protection statutes.
• Stress-test transition plans. Ensure net-zero commitments are supported by interim targets, capital expenditure plans, and third-party verification to withstand legal scrutiny.
• Monitor jurisdictional developments. Track cases in the Sabin Center and Grantham Institute databases to anticipate precedents that may affect your sector.
• Engage legal counsel early. Retain climate-specialized counsel before litigation materializes to shape strategy proactively rather than reactively.
• Build coalitions for favorable precedent. For NGOs and advocates, pool resources with peer organizations to share litigation costs and coordinate case selection to maximize precedent value while minimizing adverse-ruling risk.
• Prepare for disclosure mandates. Align reporting with CSRD, SEC, and ISSB frameworks to reduce the gap between legal disclosure requirements and voluntary claims.

FAQ

What types of climate cases are growing fastest? Greenwashing claims and corporate duty-of-care cases are the fastest-growing categories globally. Greenwashing filings increased by roughly 40 percent between 2023 and 2025 (ClientEarth, 2025). Human rights-based claims against governments are also expanding, particularly in Europe following the KlimaSeniorinnen decision, which opened the door for similar challenges across all Council of Europe member states.

Can companies face liability for Scope 3 emissions? Yes. The Shell ruling in the Netherlands explicitly included Scope 3 emissions in the court-ordered reduction target. While the legal basis varies by jurisdiction, the trend toward holding companies accountable for value-chain emissions is growing. Companies with large downstream or upstream emission profiles in fossil fuels, agriculture, and heavy industry face the highest exposure.

How should organizations prepare for climate litigation risk? Start with a litigation risk assessment that maps exposure across jurisdictions, emission scopes, and disclosure practices. Audit all public climate claims for accuracy and defensibility. Stress-test transition plans against emerging legal standards and retain climate-specialized legal counsel. Organizations that proactively address gaps in disclosure and strategy are less likely to face claims and better positioned to defend against them.

Are climate cases effective at reducing emissions? Evidence is mixed but growing. Cases that secure binding court orders, such as Urgenda and Shell, directly compel emission reductions. Even cases that fail on the merits can shift corporate behavior through reputational pressure, increased investor scrutiny, and the costs of defense. The Grantham Research Institute (2025) found that 58 percent of completed cases produced climate-favorable outcomes, suggesting that litigation is a meaningful, if imperfect, tool for emissions accountability.

What is the risk of adverse precedent? Adverse precedent is a significant strategic concern. A ruling that narrows the definition of standing, limits the scope of corporate duty, or applies a restrictive interpretation of regulatory authority can affect not only the immediate case but all future litigation in that jurisdiction. Case selection, therefore, requires careful analysis of the court, the judge, and the political and legal environment to minimize the risk of setting unfavorable precedent.

Sources

• Grantham Research Institute on Climate Change and the Environment, LSE. (2025). Global Trends in Climate Change Litigation: 2025 Snapshot. London School of Economics.
• UNEP & Sabin Center for Climate Change Law. (2024). Global Climate Litigation Report: 2024 Status Review. United Nations Environment Programme.
• Sabin Center for Climate Change Law. (2025). Climate Case Chart: Global Database of Climate Change Litigation. Columbia Law School.
• European Court of Human Rights. (2024). KlimaSeniorinnen v. Switzerland, Application No. 53600/20. Council of Europe.
• ClientEarth. (2025). Greenwashing Litigation Tracker: Trends in Corporate Climate Claims Enforcement. ClientEarth.
• Australian Securities and Investments Commission. (2024). Santos Limited: Federal Court Findings on Misleading Climate Claims. ASIC Media Release.
• Milieudefensie. (2025). Shell Climate Case Appeal: Timeline and Legal Analysis. Milieudefensie.
• Our Children's Trust. (2023). Held v. State of Montana: Youth Climate Trial Decision Summary. Our Children's Trust.