Inflated Baselines: The Accounting Fiction Undermining Carbon Offset Claims
Carbon offsets rely on hypothetical deforestation baselines easily inflated to generate credits for trees never at risk, delivering near-zero climate benefit.
Volkswagen purchased carbon offsets after its dieselgate scandal, but these credits were based on inflated deforestation baselines that overstated climate benefit. The voluntary carbon market suffers from weak governance and verification, creating systemic incentives to game baseline calculations. Without transparent, conservative baselines independently verified against real conditions, carbon credits become narratives dressed as numbers rather than genuine climate solutions.
Volkswagen bought carbon offsets even as it cheated diesel emissions tests. The credits it purchased were supposed to represent real climate benefit—forests preserved, deforestation avoided. But the projects supplying those credits relied on baselines that wildly overstated how much deforestation would have occurred without the offset funding. The result: VW got to claim it had neutralized its pollution, while the actual reduction in the atmosphere was near zero. This is the inflated baseline trick, and it’s the central mechanism that makes so many carbon offsets an accounting fiction rather than a climate solution. Here’s how it works. An offset project sets a "baseline"—a hypothetical scenario of what would have happened without the project. If a forest offset project claims it prevented 100,000 hectares of deforestation, that number depends entirely on the assumed baseline. Inflate the baseline by assuming a massive, unrealistic rate of deforestation, and suddenly you can sell millions of credits for "saving" trees that were never at risk. The credits look real on paper. The math checks out to a casual auditor. But the climate sees no difference. Volkswagen’s case is instructive because it exposes the systemic weakness. After the 2015 dieselgate scandal revealed the company had installed software to cheat emissions tests, VW turned to the voluntary carbon market to offset its excess pollution. It purchased credits from projects that were later found to have used inflated baselines. The same "additionality" math that let VW offset its fraud is still the default for most voluntary market credits today. If the baseline is a fiction, the offset is a fiction too. The problem isn't limited to one company or one project type. The voluntary carbon market suffers from weak governance, poor monitoring and verification, and widespread incentives to game the numbers. A project developer who can convince a verifier that a forest would have been completely cleared—when in reality it faced minimal threat—can generate enormous credit volumes at low cost. The buyer gets a neutral claim. The seller gets paid. The atmosphere gets nothing. What this means for anyone evaluating offset claims is straightforward: the baseline is everything. Without transparent, conservative, and independently verified baselines, a carbon credit is just a narrative dressed up as a number. If baselines are this easy to game, can any credit be trusted?