Why Carbon Recycling Is Becoming Essential for Data Centres and Hard-to-Abate Industries

Why Carbon Recycling Is Becoming Essential for Data Centres and Hard-to-Abate Industries And why CO₂ emissions matter more now than ever before Clean Energy and Water Technologies Pty Ltd (CEWT) The energy transition has focused primarily on changing the source of energy. Carbon Recycling Technology (CRT) asks an additional question: how do we stop extracting new geological carbon and continuously adding it to the natural carbon cycle? 1. Renewable energy is growing rapidly - but the world remains heavily dependent on other energy sources Solar and wind deployment is accelerating rapidly. IRENA reports that the world added a record 692 GW of renewable power capacity in 2025, lifting total renewable power capacity to 5,149 GW. Renewables accounted for 85.6% of total net power-capacity expansion in that year. Yet this rapid growth in the power sector should not be confused with renewables' share of the entire energy system. The Energy Institute reports that renewables, including hydroelectricity, met only around 8% of global energy demand in 2024. Electricity is only one component of world energy use; transport, industrial heat, chemicals, steelmaking and many other applications continue to depend heavily on molecular fuels. This distinction is fundamental: renewable electricity and installed renewable capacity are growing very quickly, while the transition of total global energy demand is much slower. The IEA reports that renewables supplied 32% of global electricity generation in 2024, demonstrating why electricity-share figures cannot be used interchangeably with total-energy-demand figures. The transition therefore cannot be measured simply by the number of gigawatts of solar panels and wind turbines installed. What ultimately matters is how much fossil energy they displace across the entire energy system. 2. Fossil fuels continue to dominate the global energy system Oil, natural gas and coal remain deeply embedded in transportation, electricity generation, industrial heat, steel, chemicals, fertilisers and manufacturing. The Energy Institute reports that global fossil-fuel consumption increased by 7% between 2017 and 2024, while its 2024 Statistical Review put fossil fuels at 81.5% of the global primary-energy mix in 2023. The IEA subsequently reported that demand for oil, gas and coal all increased again in 2024. The precise percentage varies with the energy-accounting methodology, but the conclusion is unchanged: fossil fuels still dominate the global energy system. This explains an apparent contradiction in today's transition: the world can install record amounts of renewable capacity while continuing to consume enormous quantities of fossil fuels. The underlying carbon economy remains largely linear: Geological carbon -> fuel -> energy -> CO₂ -> atmosphere 3. Unabated CO₂ emissions are accelerating climate risk Continuing greenhouse-gas accumulation is changing the climate system and increasing exposure to severe climate impacts. WMO reports that globally averaged atmospheric CO₂ reached 423.9 ± 0.2 ppm in 2024, about 53% above the pre-industrial level of roughly 278 ppm. The increase from 2023 to 2024 was 3.5 ppm, the largest annual rise in the modern observational record. WMO's State of the Global Climate 2025 reports that 2015–2025 were the hottest eleven years on record and that 2025 was the second or third hottest year, around 1.43°C above the 1850–1900 average. It also reports that extreme heat, heavy rainfall and tropical cyclones caused major disruption and devastation, while extreme weather affected millions and caused billions in losses. The central issue is not simply whether a technology is labelled green or low carbon. The deeper question is whether the global economy continues transferring geological carbon into the active carbon cycle. That leads to a fundamental question: How quickly can we stop transferring new geological carbon into the natural carbon cycle? 4. Low-cost renewable electricity does not automatically solve hard-to-abate industry Renewable electricity can now be extremely competitive. But industries such as iron and steel, chemicals, minerals processing and high-temperature manufacturing require combinations of continuous electricity, heat and molecular feedstocks. A steel plant cannot simply operate only when the sun shines or the wind blows. Green iron is a useful example: renewable electricity is essential, but electricity alone does not reduce iron ore. A chemical reducing agent is required. This is why renewable electricity must increasingly be integrated with technologies capable of supplying firm power, heat, hydrogen and molecules. 5. Renewable hydrogen is essential - but hydrogen alone does not close the carbon cycle Electrolysis and renewable-hydrogen projects have expanded considerably around the world. Hydrogen provides something renewable electricity cannot always provide directly: a means of carrying renewable energy into chemical reactions. That makes renewable hydrogen important for steel, chemicals, synthetic fuels and other industrial processes. But producing renewable hydrogen does not, by itself, close the carbon cycle. Where an industrial process continues to require carbon-containing molecules, or where hydrogen is converted into synthetic hydrocarbons using CO₂, another question immediately appears: Where does the carbon come from, and where does it ultimately go? Hydrogen can address an energy-carrier problem. It does not automatically solve the carbon-inventory problem. 6. The missing question is continued fossil-carbon extraction Much of today's decarbonisation discussion concentrates on what happens at the point of emission: capture the CO₂, replace some fuel with hydrogen, electrify the process, offset emissions, or permanently store carbon. All can have legitimate roles. But every tonne of fossil carbon extracted from geological deposits and introduced into the economy adds carbon to the active system. As long as we continuously extract new fossil carbon, use it once and release the resulting CO₂, we maintain a fundamentally linear architecture. This is the problem CRT seeks to address. From a linear carbon economy to a circular carbon economy Carbon Recycling Technology starts from a different premise: do not continuously replace carbon - recycle it. Conventional linear pathway: Geological carbon -> fuel -> energy -> CO₂ -> atmosphere Circular carbon pathway: CO₂ -> recovery -> carbon + renewable H₂ -> fuel -> energy -> CO₂ -> recycle Renewable electricity supplies the primary energy. Electrolysis converts part of that renewable electricity into hydrogen. Hydrogen supplies the energy required to restore captured carbon into useful molecules. Carbon becomes a managed circulating inventory rather than a continuously extracted fossil resource. Why this matters for AI data centres AI data centres are making the firm-power problem increasingly visible. Large computing loads require continuous, high-quality electricity, while grid connection, transmission capacity and renewable variability can constrain the speed at which new facilities are developed. Behind-the-meter generation can address part of this problem, but conventional fossil generation leaves the carbon problem unresolved. An integrated architecture combining renewable electricity, firm generation, useful heat and cooling, CO₂ recovery and carbon recycling could approach the data-centre energy problem as a complete system rather than treating electricity, cooling and emissions separately. Why this matters for hard-to-abate industries Steel, chemicals, cement, minerals processing and other industrial sectors differ substantially, but many share a common requirement for continuous energy, high-temperature heat or molecular feedstocks. The transition therefore cannot be reduced to a simple choice between fossil fuels and renewable electricity. Technologies are also needed to connect the electron economy with the molecular economy. In a carbon-recycling architecture, renewable electricity supplies primary energy, hydrogen transfers renewable energy into chemical reactions, carbon provides a recyclable molecular carrier, and recovered CO₂ closes the carbon loop. The economics: fuel recycling and carbon value The carbon question is increasingly becoming an economic question as well. If recovered carbon can be converted into reusable synthetic natural gas or another useful molecule, recycling can reduce the requirement for continuously purchased fossil fuel. This creates an intrinsic fuel-recycling benefit. A second potential value arises from carbon policy, avoided carbon liabilities or eligible environmental attributes. However, captured and recycled CO₂ should not automatically be assumed to generate a tradable carbon credit. Eligibility depends on the relevant accounting methodology and regulatory framework. For robust financial modelling and banking analysis, the two benefits should therefore be separated: Project value = Power + Cooling/Heat + Fuel-Recycling Benefit + Eligible Carbon Value The project can first be tested without carbon-credit revenue, followed by transparent carbon-price sensitivities. This allows lenders and investors to distinguish intrinsic process economics from policy-dependent upside. Follow the carbon Perhaps the simplest way to evaluate a future energy system is to ask three questions: Where did the carbon come from? Where does it go after energy conversion? Does the system require continuous extraction of new geological carbon? If the answer to the final question remains yes, part of the problem may have been reduced without eliminating the underlying carbon flow. The long-term objective should therefore go beyond reducing emissions intensity. It should progressively stop the transfer of geological carbon into the natural carbon cycle. Conclusion Renewable energy changes where our energy comes from. Renewable hydrogen changes how that energy can be carried. Carbon recycling could change what happens to carbon itself. The next phase of decarbonisation may therefore be about more than capturing carbon. It may be about learning how to stop throwing it away. Evidence note (verified August 2026): The latest authoritative data distinguish sharply between renewable power capacity/electricity and renewables' share of total global energy demand. IRENA reports that 692 GW of renewable power capacity was added in 2025, taking global renewable power capacity to 5,149 GW; renewables represented 85.6% of total net power-capacity expansion. By contrast, the Energy Institute's latest transition tracker reports that renewables including hydroelectricity met around 8% of global energy demand in 2024. Accordingly, this article uses 'around 8%' rather than 'less than 7%' when referring to total global energy demand. Verified sources for public release • Energy Institute, Statistical Review of World Energy / Country Transition Tracker (latest available total-energy-demand comparison): renewables including hydro met around 8% of global energy demand in 2024; fossil-fuel consumption rose 7% from 2017 to 2024. https://www.energyinst.org/statistical-review/energy-transition-tracker • Energy Institute, Statistical Review of World Energy 2026: total energy supply rose 1.7% in 2025 and renewables were the largest source of TES growth. https://www.energyinst.org/exploring-energy/resources/news-centre/media-releases/global-electrification-reaches-tipping-point-as-energy-demand-hits-record-highs-and-regional-paths-diverge • IRENA, Renewable Capacity Statistics 2026: 692 GW of renewable capacity was added in 2025; total renewable power capacity reached 5,149 GW; renewables represented 85.6% of total net capacity expansion. https://www.irena.org/News/pressreleases/2026/Apr/Near-700-GW-Surge-in-2025-Proves-Renewable-Energy-Resilience • IEA, Global Energy Review 2025: renewables supplied 32% of global electricity generation in 2024; demand for oil, natural gas and coal all increased in 2024. https://www.iea.org/reports/global-energy-review-2025/key-findings • WMO, Greenhouse Gas Bulletin No. 21: globally averaged atmospheric CO₂ reached 423.9 ± 0.2 ppm in 2024; the 2023–2024 increase was 3.5 ppm. https://wmo.int/resources/publication-series/greenhouse-gas-bulletin/wmo-greenhouse-gas-bulletin-no-21 • WMO, State of the Global Climate 2025: 2015–2025 were the hottest eleven years on record; 2025 was about 1.43°C above the 1850–1900 average; extreme weather caused major human and economic impacts. https://wmo.int/publication-series/state-of-global-climate/state-of-global-climate-2025