Germany's North Sea CO2 Pact Clears the Storage Bottleneck Holding Back Carbon Removal

The most important carbon removal story of the month contains no breakthrough machine and no dramatic capture tower. It is, instead, a piece of diplomatic paperwork. On October 5 and 6, at the Strategic Dialogue of the Carbon Management Forum in Berlin, Germany signed formal intention declarations with Denmark and the Netherlands to export captured carbon dioxide for permanent storage beneath the North Sea. For a carbon removal sector that has spent years perfecting how to pull CO2 out of the air and out of biogas plants, the signature that matters most may be the one deciding where the CO2 goes next.

The binding constraint was never the capture

The numbers at the capture end of the industry are finally starting to look serious. Climeworks operates the Mammoth direct air capture plant in Iceland, rated at 36,000 metric tons of CO2 per year. Occidental Petroleum's Stratos project in Ector County, Texas, which broke ground in 2023 and was once meant to start in 2024, is now expected to begin operations by the end of 2026 at up to 500,000 metric tons per year, which would make it the largest carbon removal plant in the world. Climate models suggest that holding warming below 2 degrees could require removing on the order of 10 billion metric tons of CO2 per year by 2050. Current DAC systems remove only thousands of tons annually.

Yet capture is only half the system. A machine that pulls CO2 from the air produces a concentrated gas stream that has to go somewhere: purified for industrial reuse or injected into geological formations that will hold it for centuries. Permanent storage needs pore space, permits, monitoring, and ships or pipelines. Germany, Europe's largest economy and home to some of the continent's most ambitious carbon removal startups, has no operating storage site.

What Berlin actually put on paper

The agreements were signed by Hester Somsen, Ambassador of the Kingdom of the Netherlands, Thomas Ostrup Moller, Ambassador of the Kingdom of Denmark, and Frank Wetzel, State Secretary at the German Federal Ministry for Economic Affairs and Energy. Named beneficiaries include direct air capture and carbon storage (DACCS), biogenic carbon capture and storage (BioCCS), and removals from other biogenic CO2 streams: the removal technologies that need permanent storage to scale to climate-relevant levels.

The mechanics are straightforward. Once a developer captures and concentrates CO2, it must either purify the gas for industrial repurposing or send it to permanent storage. The declarations give German developers a formal legal basis for planning storage pathways through Denmark and the Netherlands, where offshore North Sea reservoirs are already being developed. It is a precedent, too: Belgium and the United Kingdom have signed a similar cross-border storage arrangement, and a web of bilateral cooperation is forming across the continent.

German carbon removal companies need access to permanent CO2 storage. The export agreements with Denmark and the Netherlands give them the first credible path to it.

That framing comes from Stefan Schlosser, chief executive of the German negative emissions association DVNE, quoted in coverage of the Berlin event. Storage access has been one of the biggest barriers holding German carbon removal back, and the agreements replace hand-waving about future cooperation with a formal document companies can show their boards, lenders, and project planners.

The North Sea is quietly becoming carbon infrastructure

The storage side of the North Sea equation is no longer theoretical. The Greensand project in the Danish North Sea is developing storage with a first-phase capacity of up to 400,000 tonnes of CO2 per year, and Danish biomethane plants are expected to be its main source of CO2 in that phase. Even smaller projects are moving: the Oslo-based company Inherit has begun shipping biogenic CO2 from a biogas site in Tonder, Denmark, at 10,000 tonnes per year, showing that biogas plants, which already produce a concentrated and cheap-to-capture CO2 stream, can reach operating storage by truck and ship without waiting for pipelines.

The Netherlands, meanwhile, has signed bilateral cooperation agreements on carbon capture and storage with Belgium, Switzerland, Denmark, France, and the United Kingdom, according to a market overview from the Carbon Capture and Storage Association. Germany's declarations slot into a regional pattern rather than standing alone.

The definitions problem is still unsolved

Storage access is necessary but not sufficient. As analysts at Captain Drawdown noted in an October 8 review, the European Union is discussing bringing 250 million tons of removals into its Emissions Trading System, but that headline number says nothing about which removals qualify. Permanent removals, meaning CO2 locked into geological storage through DACCS or BECCS, behave like a true offset against fossil emissions. Reversible removals from forests and soils are different: they can release carbon back, and they are already counted under the EU's separate land accounting rules. If the same tonne is credited twice, the 250 million tons grow on paper while shrinking in practice.

Berlin's declarations enable the physical flow of CO2 to storage. They do not decide what counts as a removal, how durable it must be, or what price it commands. Those definitions will determine whether the North Sea storage boom produces genuine atmospheric cleanup or an accounting mirage.

What could go wrong

Sub-seabed storage carries genuine technical and governance risks. Experts commenting on the German plan have cautioned that the environmental risks of injecting CO2 deep beneath the North Sea must be carefully monitored, from well integrity to the long-term behavior of stored gas. Liability is an open question: California Resources Corporation achieved its first CO2 injection at the Carbon TerraVault I project in May 2026, while California had still not adopted state-level carbon storage rules, leaving uncertainty about who would be responsible if something went wrong. Germany's own legal framework is incomplete as well. Its planned Carbon Management Strategy includes ratifying the amendment of the London Protocol that would formally allow CO2 export for offshore storage, meaning the Berlin declarations sit ahead of some of the law that is supposed to govern them.

There is also the familiar risk of storage becoming a justification for delay. The same wells that bury CO2 from hard-to-abate cement, chemicals, and waste incineration can carry CO2 from sources that could have been decarbonized directly. Germany's strategy language says support will focus on emissions that are hard or impossible to avoid. Keeping that boundary honest will be a job for regulators, not diplomats.

What to watch next

Three signals will tell us whether the Berlin paperwork turns into tonnage. The first is commercial: whether German developers convert the declarations into signed storage contracts and actual shipping routes, with measurement, reporting, and verification attached. The second is legislative: the finalization of Germany's Carbon Management Strategy and the London Protocol ratification, which together determine how bankable cross-border storage becomes. The third is the certification layer: the EU's eligibility rules for removals in the Emissions Trading System, where tight definitions would do more for the climate than a larger headline number with loose ones.

Carbon removal has always been presented as a story about machines: bigger fans, better sorbents, cheaper heat. The Berlin week suggests the decisive chapters may be written by lawyers and ambassadors instead. Capture makes headlines. Storage, quietly, makes tonnes.