The Integrity Council for the Voluntary Carbon Market’s Core Carbon Principles label, the leading quality benchmark in voluntary carbon markets, already excludes large-scale landfill gas projects that combine flaring with electricity generation, the exact category Era4’s UK data center plan depends on. That exclusion predates and exists independently of Era4’s specific project, rooted in a documented pattern across the landfill gas credit category rather than a novel concern raised only by this one initiative.
Era4’s plan to build AI data centers at eight UK waste sites, powered by landfill gas already being converted to electricity under mandatory capture rules, runs directly into a distinction carbon market analysts have scrutinized closely in recent years: the difference between landfill gas projects that only flare methane and those that also generate electricity from it. MSCI’s carbon markets research notes that flaring-only projects “tend to have high financial additionality as they receive no revenue other than carbon credits,” while landfill gas projects that also generate and sell electricity typically have an independent revenue stream that makes the underlying activity self-sustaining without carbon finance. That distinction is significant enough that the initial set of Core Carbon Principles issued by the Integrity Council for the Voluntary Carbon Market excludes large-scale flaring-and-electricity landfill projects from qualifying for its label altogether, a market-wide determination that applies to the project type generally rather than a judgment specific to Era4’s sites.
The pattern critics describe in Era4’s case also has a documented precedent in landfill gas credits issued elsewhere. Research published by CarbonPlan examining projects certified under a widely used US landfill gas protocol found that of fourteen credited projects, six showed crediting gaps of three years or longer, periods during which regulatory filings showed the underlying methane destruction systems continued operating without interruption, and in several cases the systems expanded during the gap rather than being scaled back. That pattern directly undermines the additionality claim those projects were built on, that the activity would not continue, or would be curtailed, without carbon revenue, since continuous and even growing operation during years the projects received no credits demonstrates the activity was not actually contingent on that revenue. Era4’s plan follows a similar logic: electricity generation from the landfill gas at its sites is already occurring under existing subsidy support, and Planet First’s own response to questions about the project concedes this, arguing only that the subsidy, not the proposed carbon credits, is what keeps the generation running.
Planet First’s stated ambition for Era4’s credits also faces a structural obstacle beyond the additionality question. The registry has applied to have its credits recognized both under CORSIA, the UN aviation agency’s offset scheme, and under the EU’s Carbon Removals and Carbon Farming Regulation, which came into force in December 2024. Those two goals may not be simultaneously achievable for the same underlying credits. The CRCF requires that units generated under its framework count toward the EU’s own Nationally Determined Contribution and explicitly states they are not to be used toward third-party or international compliance schemes, which would include CORSIA, unless the EU separately authorizes the underlying mitigation outcome under Article 6 of the Paris Agreement for use outside its own national contribution, an authorization the EU’s current NDC does not provide for project-based crediting. That means Planet First’s dual-track strategy of seeking recognition from both schemes for what appears to be the same category of landfill gas credits runs into a design conflict in the frameworks themselves, independent of whether Era4’s specific project can satisfy either scheme’s additionality tests on its own.
None of this depends on Era4’s own account of its plans, since the company did not respond to questions about the project. What is independently verifiable is that UK and EU landfill operators have been required to capture site methane for years, that Era4’s earmarked sites are already generating grid electricity from that captured gas, and that the specific combination the company is proposing, crediting the continuation of an already-mandatory, already-subsidized, already-operating activity, matches a failure pattern carbon market researchers have documented repeatedly in the same project category rather than describing a new or unusual case. The 430,000 tonnes of CO2 in credits Era4’s registration claims it will generate between 2026 and 2035, roughly equivalent to the annual emissions of 100,000 passenger cars, is the project’s own registered projection rather than an independently verified figure, and it rests on the same additionality claim that Lengyel, Macintosh and the broader landfill gas credit record all call into question. Separately, the local opposition the plan has generated, more than 4,000 petition signatures against the site proposed near Canterbury, reflects a now-familiar pattern of communities resisting AI data center siting on resource and environmental grounds, adding a second layer of practical obstacles to a project whose underlying carbon credit rationale already faces scrutiny that predates this specific proposal.
