Greenwashing is not a fringe phenomenon. It occurs across industries, at the highest levels of corporate leadership, and often in plain sight. What changes over time is the cost of getting caught.
These five cases illustrate the mechanics of greenwashing: the tactics used, how the gap was exposed, and what followed.
1. Volkswagen - The Diesel Emissions Scandal
Volkswagen spent years positioning its diesel vehicles as low-emission, environmentally responsible alternatives to petrol cars. The company invested heavily in "clean diesel" marketing and earned significant ESG credit for the narrative.
In 2015, the US Environmental Protection Agency revealed that Volkswagen had installed defeat device software in 11 million vehicles worldwide. The software detected emissions tests and activated full emissions controls only during testing - on the road, the vehicles emitted up to 40 times the legal NOx limit.
What the data said: Real-world emissions data from independent researchers at West Virginia University diverged sharply from manufacturer-reported figures - the signal that triggered the formal investigation. The gap between claimed and actual emissions was not marginal; it was structural and deliberate.
Consequence: Over $30 billion in fines, settlements, and vehicle buybacks across multiple jurisdictions. Criminal charges against executives. A wholesale collapse of the "clean diesel" category.
2. H&M - The Conscious Collection
H&M launched its "Conscious Collection" as an environmentally responsible fashion line, using terms like "sustainable," "recycled," and "conscious choice" extensively in marketing. Investigations found that H&M's sustainability scorecards contained errors, omissions, and in some cases made products appear more sustainable than conventional alternatives without supporting evidence.
What the data said: Third-party analysis found that the Higg Material Sustainability Index scores H&M used had not been independently verified and, in several cases, rated synthetic materials higher than natural fibres based on contested methodology.
Consequence: H&M withdrew the scorecards. Norway's consumer watchdog issued a formal ruling. Class action lawsuits were filed in the United States.
3. DWS / Deutsche Bank Asset Management
DWS marketed a substantial portion of its assets under management as ESG-integrated. Its 2020 annual report claimed over half of $900 billion AUM was managed with ESG criteria applied.
In 2021, the company's former head of sustainability filed a whistleblower complaint with the SEC alleging that the ESG claims were overstated and that ESG criteria were far less systematically applied than public disclosures suggested.
What the data said: Internal documents reportedly showed that ESG was applied inconsistently and that headline AUM figures in marketing materials significantly overstated actual ESG integration.
Consequence: SEC and German BaFin investigations. The CEO resigned. DWS paid $25 million to settle SEC charges in 2023 - the first major greenwashing enforcement action against an asset manager.
4. Shell - Net Zero Advertising
Shell ran advertising campaigns emphasising its net-zero ambitions, renewable energy investments, and carbon offset programmes - presenting the company as actively transitioning away from fossil fuels.
What the data said: Shell's capital expenditure allocation showed the vast majority of investment going into oil and gas, with renewables representing a small fraction. A UK court later ordered Shell to deepen its emissions cuts, finding its existing climate plans insufficient.
Consequence: The UK Advertising Standards Authority banned Shell ads for being misleading. A Netherlands court ruling required Shell to cut absolute emissions 45% by 2030 versus 2019 levels - beyond its stated targets.
5. Ryanair - "Lowest Emissions" Claims
Ryanair repeatedly advertised itself as Europe's "lowest emissions airline" and promoted individual flights as low-carbon choices, using CO₂ per passenger figures without adequate context.
What the data said: The UK Advertising Standards Authority found that the claims were misleading because they omitted the fact that flying - even on efficient aircraft - remains among the highest per-journey emissions activities.
Consequence: Multiple ad bans across European markets. Ryanair became one of the most-cited examples of greenwashing in advertising guidance issued by regulators.
What These Cases Have in Common
Across all five cases, the pattern is the same: a gap between what was claimed publicly and what independent evidence showed. The exposure came not from the companies themselves, but from regulators, researchers, whistleblowers, and journalists examining the underlying data.
This is exactly the problem that ESG verification is designed to solve - systematically, before the gap becomes a headline.