Denmark has opened the world's largest carbon capture plant. It is on the coast of western Denmark. The plant started working in March 2026. Its name is Mammoth Nordic.
The plant removes carbon dioxide (CO₂) from the air. CO₂ is a gas that causes climate change. Mammoth Nordic can remove 72,000 metric tons of CO₂ every year. This is like taking 15,000 cars off the road. A Swiss-Danish company called Climeworks Scandinavia built the plant.
How does it work? Big fans pull air into the plant. Special filters catch the CO₂. Then the plant heats the filters to collect the CO₂. The CO₂ travels through underground pipes. It goes 1,800 meters under the sea into rock. Over about two years, it slowly turns into stone. The plant uses wind energy, so it produces very little CO₂ itself.
Some people are not happy about the plant. Groups like Greenpeace Nordic say it could give oil and gas companies an excuse to keep polluting. Dr. Lena Sørensen from Aarhus University said: "Carbon removal is not a substitute for reducing emissions. It should help with difficult sectors like aviation, cement, and farming."
The plant cost €1.3 billion to build. The EU gave €150 million. The Danish government gave €200 million. Private investors gave the rest. The IEA says the world needs to remove 5–10 gigatons of CO₂ per year by 2050 to limit warming to 1.5°C. Denmark already gets over 80% of its electricity from renewable energy.