As greenwashing lawsuits surge, environmental experts are playing a critical role in verifying sustainability claims like “carbon neutral” or “ethically sourced.” This piece explores how expert testimony is shaping legal outcomes in marketing disputes and why companies must back their ESG messaging with verifiable data.
Greenwashing lawsuits are reshaping the boundaries of marketing law—and environmental experts are taking center stage in defining what sustainability claims actually mean.
In today’s marketplace, environmental claims like “carbon neutral,” “zero waste,” and “ethically sourced” are more than branding tools—they’re legal liabilities.
As ESG (Environmental, Social, and Governance) disclosures attract mounting scrutiny from regulators, investors, and plaintiffs, a wave of litigation is targeting what many claim are misleading or unsubstantiated green marketing statements.
We’ve worked with attorneys who were caught off guard by how fast a sustainability tagline can become a discovery target. In greenwashing cases, it’s not enough to mean well—plaintiffs are digging into emissions data, offset programs, and lifecycle assessments. If there’s a gap between the marketing and the math, it won’t go unnoticed. That’s why environmental experts have become essential to mounting a credible defense—or building a strong claim.
The Rise of Greenwashing Litigation
With environmental awareness growing among consumers and stakeholders, companies face increasing pressure to validate their sustainability messaging.
What was once considered aspirational branding is now being tested in court under statutes governing false advertising, consumer protection, and securities fraud.
Notable Class Actions
Smith v. Danone North America
Plaintiffs alleged that Danone’s “carbon neutral” label on Evian bottles was misleading, as it relied on carbon offset purchases rather than actual emission reductions.
Earth Island Institute v. Coca-Cola
The suit claimed Coca-Cola engaged in deceptive marketing by promoting itself as environmentally responsible while being one of the largest contributors to global plastic pollution.
Lee v. Canada Goose
This case alleged that the company misrepresented its use of “ethically sourced” materials, raising questions about animal welfare and environmental transparency.
These lawsuits show how environmental claims, when unsupported or poorly defined, can quickly become legal flashpoints.
Why Environmental Experts Matter
At the heart of greenwashing litigation is a simple but critical question: Are a company’s sustainability claims factual, measurable, and legally defensible?
Environmental expert witnesses play a key role in answering that question. Their analysis helps courts and regulatory bodies evaluate the validity of ESG statements and determine whether they meet the standards set by law.
Areas of focus include:
- Carbon accounting and emissions disclosure
- Life-cycle assessments (LCAs) of product and packaging impact
- Verification and efficacy of carbon offsets
- Compliance with FTC Green Guides and international ESG frameworks
- Supply chain audits and material sourcing accuracy
In greenwashing litigation, persuasive environmental testimony is no longer optional—it’s essential to establishing credibility, liability, and potential damages.
Why Partner with AP Expert Group
At AP Expert Group, we support legal teams involved in ESG, advertising, and consumer protection litigation by providing vetted, Daubert-ready environmental experts.
Our professionals are skilled at translating complex scientific data into clear, compelling testimony—grounded in real-world practices and regulatory standards.
Our network includes:
- Environmental scientists and carbon auditors
- ESG compliance and reporting specialists
- Packaging and product sustainability consultants
- Experts on the legal interface between marketing and environmental regulation
Whether you’re preparing a greenwashing class action or defending a challenged sustainability claim, we help attorneys build fact-driven cases that stand up to legal and technical scrutiny.
Join the Conversation
Have you litigated ESG-related disputes or advised clients on sustainability advertising risk?
We’d love to hear how your team is navigating the evolving world of environmental litigation—and may even feature your perspective in a future post.