Sustainability for General Counsels

The General Counsel's Sustainability Challenge

ESG litigation is no longer a hypothetical. More than 3,600 climate cases have been filed worldwide since 1986, 249 of them in 2025, and cases challenging misleading climate claims are now the most common type brought against companies, according to the Grantham Research Institute's 2026 snapshot. As General Counsel, you're the last line of defense between your organization and regulatory enforcement, shareholder derivative actions, and reputational damage that can erase years of brand equity in a single news cycle.

The regulatory landscape is fragmenting fast. The EU's CSRD imposes mandatory sustainability reporting on thousands of companies—including non-EU companies with significant European revenue. California's SB 253 creates emissions disclosure obligations for large companies doing business in the state regardless of where they're headquartered, with first reports due November 10, 2026; its companion law on climate-related financial risk, SB 261, is on hold while a court appeal proceeds. The SEC's 2024 climate rules never took effect, and in 2026 the SEC proposed rescinding them. Meanwhile, the FTC's Green Guides, last revised in 2012, still set the federal baseline for environmental marketing claims. Your organization is making sustainability claims somewhere—on its website, in investor presentations, in product packaging—and every one of those claims is a potential liability if it can't be substantiated.

The GC's challenge isn't just reactive risk management. It's building a legal infrastructure that allows the business to pursue legitimate sustainability goals without creating exposure. That means reviewing supply chain contracts for ESG compliance clauses, ensuring board-level climate governance meets emerging fiduciary standards, and establishing internal controls that make sustainability disclosures as rigorous as financial ones.

Key Responsibilities

Regulatory Compliance Architecture. Map the full universe of ESG regulations applicable to your organization across all jurisdictions. Build a compliance calendar with filing deadlines, data collection requirements, and internal review processes. This isn't a one-time exercise—new regulations are emerging quarterly.

Disclosure Review & Liability Management. Review all sustainability-related disclosures—annual reports, proxy statements, sustainability reports, marketing materials, and investor presentations—for accuracy, consistency, and legal defensibility. Inconsistent claims across documents are plaintiff attorneys' favorite targets.

Contract & Supply Chain Risk. Embed ESG compliance requirements in supplier agreements, including audit rights, emissions reporting obligations, and termination clauses for material ESG violations. The EU's Corporate Sustainability Due Diligence Directive (CSDDD) will require companies with more than 5,000 employees and €1.5 billion in net turnover to carry out human rights and environmental due diligence across their chains of activities from July 2029, with civil liability for harms left to national law.

Board Governance. Advise the board on climate governance best practices, including committee oversight structures, director competency requirements, and integration of climate risk into enterprise risk management frameworks.

Litigation Preparedness. Develop and maintain a litigation readiness plan for ESG-related claims, including document preservation protocols, expert witness identification, and response playbooks for regulatory inquiries.

Regulatory Pressure Points

EU CSRD & CSDDD. The CSRD requires sustainability reports aligned with European Sustainability Reporting Standards, with limited external assurance; since the 2026 Omnibus I directive it covers companies with more than 1,000 employees and more than €450 million in net turnover. The CSDDD imposes due diligence obligations across chains of activities for human rights and environmental impacts from July 2029, leaves civil liability to national law, and caps fines at 3% of worldwide net turnover.

SEC Climate Disclosure Rules. The SEC's 2024 rules would have required registrants to disclose material climate-related risks, governance processes, material Scope 1 and 2 emissions (larger filers only), and the financial impact of severe weather events. They never took effect: the SEC stayed them in April 2024, voted in March 2025 to stop defending them in court, and in 2026 proposed rescinding them (SEC). The Eighth Circuit is holding the litigation in abeyance.

California SB 253 (Climate Corporate Data Accountability Act). Requires companies with annual revenues exceeding $1 billion doing business in California to disclose Scope 1, 2, and 3 emissions annually, with third-party assurance requirements phasing in.

FTC Green Guides. The FTC's Guides for the Use of Environmental Marketing Claims were last revised in 2012; a review the agency opened in December 2022 has not produced revised guides (FTC). Key areas of scrutiny include "carbon neutral," "net zero," and "sustainable" claims that lack substantiation. Enforcement actions have resulted in multi-million dollar penalties.

State Attorney General Actions. Multiple state AGs have opened investigations into corporate greenwashing, particularly in the energy, financial services, and consumer products sectors. These actions often rely on state consumer protection statutes with broad standing provisions.

Anti-ESG Legislation. Over 165 anti-ESG bills have been introduced across U.S. state legislatures since 2023. GCs must navigate the tension between voluntary ESG commitments and state laws that restrict consideration of ESG factors in investment, procurement, or lending decisions.

Quick Wins

1. Conduct a greenwashing audit. Review every public sustainability claim your organization has made in the past 12 months—website, annual report, press releases, product labels, social media. Flag any claim that lacks documented, verifiable support. Remediate or remove unsupported claims within 90 days.

2. Standardize ESG contract language. Draft template ESG clauses for supplier and vendor agreements covering emissions reporting, human rights due diligence, and compliance with applicable environmental regulations. Roll out with your top 50 suppliers first.

3. Brief the board on fiduciary duty evolution. Prepare a 30-minute board presentation on how fiduciary duty is being reinterpreted in the context of climate risk. Reference ClientEarth v. Shell, in which English courts in 2023 refused to let a climate-based claim against Shell's directors proceed, and recent Delaware Chancery opinions on ESG oversight obligations.

4. Establish an ESG disclosure committee. Create a cross-functional review committee—legal, finance, sustainability, investor relations—that reviews all ESG-related disclosures before publication. Model it on your existing disclosure committee for SEC filings.

5. Map your regulatory exposure. Build a jurisdiction-by-jurisdiction matrix of ESG regulations applicable to your organization, including effective dates, reporting requirements, and penalty structures. Update it quarterly.

How Council Fire Can Help

Council Fire partners with legal teams to build ESG compliance programs that withstand regulatory scrutiny and litigation pressure. We help General Counsels map regulatory obligations across jurisdictions, design internal controls for sustainability data integrity, and develop disclosure review protocols that catch inconsistencies before they become liabilities.

Our team has deep experience in CSRD readiness assessments, supply chain due diligence program design, and greenwashing risk audits. We work alongside outside counsel—not as a replacement—to ensure that sustainability programs are built on defensible foundations. We bring the technical sustainability expertise that most law firms lack, translating emissions data, science-based targets, and climate scenarios into language that legal teams can evaluate and boards can govern.

FAQs

Is "aspirational" sustainability language legally risky? Yes, increasingly so. Courts and regulators are scrutinizing forward-looking sustainability commitments—net zero pledges, carbon neutrality goals, supply chain decarbonization targets—for substantiation. If your organization announces a 2030 emissions reduction target, you need a documented transition plan with interim milestones, allocated capital, and governance oversight. Aspirational language without a credible plan is the textbook definition of greenwashing liability.

How should we handle anti-ESG legislation in states where we operate? Map the specific restrictions in each jurisdiction. Most anti-ESG laws target financial institutions and public pension funds, not operating companies making voluntary sustainability commitments. However, if your organization contracts with state or local governments, procurement restrictions may apply. The key is separating legally protected commercial decisions from politically motivated ESG commitments that could create contractual or regulatory issues.

Do we need third-party assurance for sustainability reports? Under the CSRD, yes—limited assurance is required, and the 2026 Omnibus I directive dropped the planned move to reasonable assurance. Under California SB 253, the law phases in independent assurance of Scope 1 and 2 emissions (CARB is not requiring it for the first reports, due in 2026), rising to reasonable assurance in 2030, when limited assurance of Scope 3 begins. Even where not legally mandated, third-party assurance significantly reduces litigation risk by demonstrating good faith and methodological rigor.

What's the board's liability for climate risk oversight failures? Evolving, but directionally clear. The Caremark standard requires boards to establish reporting systems for material risks. As climate risk becomes financially material for more companies, failure to implement climate governance structures could support breach of fiduciary duty claims. The safest posture is to integrate climate risk into existing enterprise risk management and document board-level oversight thoroughly.