{"id":38765,"date":"2026-02-22T19:26:47","date_gmt":"2026-02-22T18:26:47","guid":{"rendered":"https:\/\/www.co2news.sk\/?p=38765"},"modified":"2026-02-24T20:08:51","modified_gmt":"2026-02-24T19:08:51","slug":"perspectives-on-carbon-dioxide-removal-technologies-cdr-a-path-to-closing-the-carbon-cycle","status":"publish","type":"post","link":"https:\/\/www.co2news.sk\/en\/2026\/02\/22\/perspectives-on-carbon-dioxide-removal-technologies-cdr-a-path-to-closing-the-carbon-cycle\/","title":{"rendered":"Perspectives on Carbon Dioxide Removal (CDR) Technologies: The Path to Closing the Carbon Cycle"},"content":{"rendered":"

Achieving net zero goals is no longer just a matter of drastically reducing emissions. The scientific consensus is now clear: without active carbon dioxide removal (CDR) from the atmosphere, it is impossible to meet goals of the Paris Agreement. If we think of the climate crisis as an overflowing bathtub, reducing emissions means turning off the tap, but CDR technologies represent a drain that must drain accumulated water<\/strong>, to bring the system back into balance. This article analyzes the current state, emerging technologies, and key factors that will determine whether the sector can grow to the necessary levels in the coming decades.<\/p>\n

The gap between ambition and reality<\/strong><\/p>\n

CDR is now the essential \u201efinishing touch\u201c of the global climate strategy. Estimates suggest that by 2050 we will need to remove approximately 7 to 9 billion tons of CO\u2082<\/strong>. However, the current reality is in stark contrast to these needs. While conventional methods such as afforestation already remove around 2 billion tons per year, new industrial CDR technologies are still in their infancy. In 2023, the global deployment of these new technologies (excluding forests) was just over 1.3 million tons<\/strong>, which is almost microscopic compared to annual emissions of 40 billion tonnes. This colossal gap between targets and the current state is driving innovation across the spectrum of solutions.<\/p>\n

Portfolio of technology solutions<\/strong><\/p>\n

There is no \u201esilver bullet.\u201c Success will depend on a portfolio of approaches that combine natural processes with high-tech engineering.<\/p>\n

1. Biochar: A \u201eSleeping Giant\u201c Ready for Deployment<\/strong> Biochar currently dominates the durable carbon removal market, delivering approximately 90 % of all verified tons<\/strong>. It is a stable form of carbon produced by the pyrolysis of biomass (e.g. agricultural waste) that can lock in CO\u2082 for millennia. At a cost of between $150 and $250 per ton, it is one of the most affordable technologies. The potential of biochar is enormous; using just a fraction of the global agricultural waste could remove billions of tons of CO\u2082 per year. An example of successful scaling is Brazil, which, thanks to its agricultural base, can supply tens of millions of tons of removals per year.<\/p>\n

2. DACCS: Direct Air Capture<\/strong> DACCS (Direct Air Carbon Capture and Storage) technology uses machines to chemically filter CO\u2082 directly from ambient air. Although it is seen as promising for achieving net negative emissions, its main obstacles remain its high cost (currently $200-700 per tonne) and high energy intensity. DACCS is likely to become a tool of \u201elast resort\u201c for sectors that cannot be decarbonised otherwise, but its mass deployment is not expected until after 2030, when emissions prices could rise to the level of its costs.<\/p>\n

3. WECCS: Turning Waste into a Climate Asset<\/strong> Waste to Energy with Carbon Capture (WECCS) offers a unique triple benefit: it prevents methane emissions from landfill, reduces fossil emissions and permanently stores biogenic carbon from organic waste. In the UK, WECCS could capture 5 to 8 million tonnes of CO\u2082 per year, turning waste incinerators into carbon-negative power plants. Analyses show that WECCS provides up to twice the net climate benefit<\/strong> per ton of waste than the production of sustainable aviation fuels (SAF).<\/p>\n

4. Accelerated rock weathering and mineralization<\/strong> These methods accelerate the natural geochemical cycle in which rocks absorb CO\u2082. Spreading crushed minerals, such as limestone or basalt, on agricultural land converts atmospheric CO\u2082 into stable bicarbonates. Limestone weathers to 10,000 times faster<\/strong> than silicates, making it a more effective tool in the face of the climate crisis. Ex situ mineralization (ESEM) allows CO\u2082 to be sequestered in industrial waste (e.g. steel slag), creating building materials with a negative carbon footprint.<\/p>\n

5. Marine Carbon Removal (mCDR)<\/strong> The oceans are the largest carbon reservoir on the planet. Methods for mCDR include increasing ocean alkalinity or direct CO\u2082 capture from seawater (DOC). The advantage of DOC is that it does not require chemical adsorbents like DAC and can utilize existing infrastructure, such as desalination plants. Despite its enormous potential, mCDR faces environmental uncertainties and requires strict international governance.<\/p>\n

Key factors for global scaling<\/strong><\/p>\n

For CDR to become a routine part of climate policy, three fundamental factors must be met:<\/p>\n