When carbon capture helps and when it distracts

Carbon capture represents not one technology or policy but a broad set of methods that extract carbon dioxide from flue gases or directly from the atmosphere and then either store it permanently underground, channel it into products, or inject it in ways that hold CO2 only for limited periods. Its value or harm depends on factors such as intent, timing, scale, governance, and economic viability. The following is a concise evaluation of the situations in which carbon capture serves as a useful instrument and those in which it poses risks of delay, inefficiency, or greenwashing.

How carbon capture can make a difference

Decarbonizing hard-to-abate industries: Sectors such as cement, steel, and chemicals, along with various high-temperature industrial activities, release CO2 as an inherent process output rather than from energy consumption. For many of these industries, capturing emissions directly at the source becomes one of the most feasible strategies for achieving net-zero goals.
Removing residual emissions: Even after pushing energy efficiency, electrification, and fuel switching to their limits, some CO2 emissions persist. Technologies for permanent removal, including direct air capture and bioenergy with CCS, can counterbalance these remaining emissions and support net-negative outcomes when necessary to meet climate objectives.
Enabling low-carbon fuels and hydrogen: When CO2 is captured from natural gas reforming and securely stored, it enables the production of lower-carbon hydrogen, commonly called blue hydrogen, serving as a transitional option while renewable-based green hydrogen capacity expands. This proves particularly valuable in situations where hydrogen demand rises quickly but renewable resources or electrolyzer availability remain constrained.
Demonstrated successful storage cases: Active projects confirm that the technology works at scale. Norway’s Sleipner project, for example, has injected around 1 million tonnes of CO2 each year into a saline aquifer since the mid-1990s. Initiatives such as the Northern Lights facility, led by the UK and Norway, show that large-scale shared transport and storage networks can be developed successfully.
When backed by robust policy and finance: Measures like carbon pricing, tax incentives, grants, and regulated emission cuts make these projects commercially realistic and ensure that captured CO2 represents additional reductions rather than replacing necessary mitigation. Effective policy design channels capture efforts to the places where they deliver the greatest climate gains.

How carbon capture distracts

Delaying emissions reductions: Relying on capture as a promise to fix future emissions can allow continued investment in fossil infrastructure. Capture with weak safeguards can become an excuse to defer energy efficiency, electrification, or fuel switching.
Subsidizing counterproductive fossil activity: When capture is coupled with enhanced oil recovery (EOR), captured CO2 can boost oil production. That creates a perverse result: more oil extracted and burned may outweigh the CO2 stored, especially if accounting is weak.
High cost and limited near-term scale: Many capture approaches are expensive. Point-source capture costs vary widely but can be tens to low hundreds of dollars per tonne; direct air capture (DAC) costs have been hundreds of dollars per tonne at commercial demonstration scale. That makes capture a poor substitute for lower-cost emissions reductions in many sectors.
Energy penalty and lifecycle emissions: Capture systems require energy. If that energy comes from fossil fuels, the net climate benefit shrinks. Capture can reduce plant efficiency by a significant fraction, increasing fuel use and operating costs.
Questionable permanence and monitoring: Geological storage requires long-term monitoring to ensure CO2 remains sequestered. Projects with weak monitoring, unclear liability, or poor public engagement risk leakage concerns and community opposition.
BECCS land-use and sustainability risks: Bioenergy with CCS (BECCS) can produce net-negative emissions on paper but may cause land-use change, biodiversity loss, food competition, and uncertain carbon accounting if biomass sourcing is not rigorously managed.

Representative examples and their results

Sleipner (Norway): A long-running example of successful offshore storage. Since 1996, Sleipner has injected roughly 1 million tonnes of CO2 per year into a saline formation, demonstrating secure storage and continuous monitoring for decades.
Boundary Dam (Canada): A coal power retrofit capturing around 1 million tonnes CO2 annually. It proved retrofits are technically possible but highlighted high capital costs, operational complexity, and the difficulty of competing with cheaper low-carbon alternatives like renewables.
Petra Nova (USA): Captured over a million tonnes per year from a coal plant but was idled amid economic pressures and low oil prices; it illustrated how project economics and policy support determine longevity.
Gorgon (Australia): A large industrial CCS project tied to natural gas processing that initially failed to meet storage targets and revealed the operational and measurement challenges in large subsurface projects.
Climeworks DAC plants (Iceland, Switzerland): Orca in Iceland and follow-on plants show that DAC works technically at small scale (thousands to tens of thousands of tonnes per year). Cost and energy supply are the major barriers to scaling to the gigatonne level quickly.

Expenses, scope, and schedules

Cost ranges: Capturing CO2 directly at industrial facilities can run from several tens to the low hundreds of dollars per tonne, influenced by CO2 concentration levels and how complex the retrofit is. Current DAC operations often exceed a few hundred dollars per tonne, though many projections anticipate lower costs as deployment expands, expertise grows, and low-carbon energy becomes more affordable.
Scale gap: Climate pathways that depend significantly on negative emissions envision expansive use of BECCS and DAC by midcentury. Reaching gigatonne-level removal demands swift, long-term commitments to build out manufacturing capacity, transport pipelines, suitable storage reservoirs, and renewable power to sustain capture systems.
Timing matters: Cutting emissions now through efficiency upgrades, electrification, and renewable energy yields immediate climate gains. Carbon capture can reinforce these efforts but cannot replace the need for rapid and substantial early reductions.

Practical decision guide: determining the right moment to apply carbon capture

Prioritize reductions first: Tap into the most affordable measures—boost efficiency, shift to electrification, and substitute materials—before turning to capture.
Use capture where alternatives are limited: Give preference to industrial process emissions and chemical feedstocks when few viable abatement choices exist.
Prefer permanent storage with strong monitoring: Require projects to commit to verified, long-duration geological storage supported by independent oversight and well-defined liability rules.
Avoid coupling with EOR unless strict accounting exists: If capture supports oil production, demand transparent, full‑lifecycle accounting to guarantee a genuine climate benefit.
Design policy to prevent delay: Tie subsidies to proven emissions cuts, temporary support windows, and a clear route away from fossil reliance.
Safeguard land and supply chains for BECCS: Deploy biomass-based capture only under rigorous sustainability standards to prevent harm to biodiversity and food security.

Key priorities for policy and governance

Clear accounting rules: Precise and transparent systems for measurement, reporting, and verification (MRV) are vital to ensure captured CO2 is neither counted twice nor used to legitimize continued emissions.
Long-term liability and monitoring: Governments and project sponsors must establish clear responsibility for overseeing stored CO2 across future decades and even centuries.
Targeted incentives: Financial backing should prioritize initiatives that deliver the greatest climate gains per dollar and avoid reinforcing fossil-based infrastructure.
Community engagement and social license: Local communities need to be consulted, kept informed, and fairly compensated whenever projects pose land-use impacts or potential safety concerns.

Trade-offs to accept and mitigate

Infrastructure needs: Pipelines, transport routes, storage facilities, and the energy required for capture demand both time and significant funding, so planning should reflect overall future demand and encourage shared hubs to lower expenses.
Energy supply: Capture operations have to rely on low-carbon power to maintain their climate advantages; without it, overall emissions cuts diminish or may even be undone.
Risk of capture reliance: Policymakers need to weigh funding for capture against quicker and more economical emission reduction options to prevent costly long-term dependency.

Carbon capture is presented as a practical instrument for targeted challenges, such as managing unavoidable process emissions, ensuring permanent storage of remaining CO2, and supporting decarbonization in sectors with limited alternatives. Its advantages are genuine, yet they rely on strict accounting, reliable long-term storage, robust policy frameworks, and a clear priority on cutting emissions first. When capture is used because it is politically expedient or financially profitable for extending fossil fuel operations, it diverts attention from the transformative measures needed to reduce emissions at their origin. Responsible use involves selecting projects that deliver the greatest climate gains, applying capture only after substantial mitigation efforts, and establishing transparency and safeguards to ensure that captured carbon genuinely contributes to, rather than slows down, the shift toward a low-carbon economy.