Denmark plans to store under the sea large amounts of carbon dioxide (CO2), which warms the Earth's climate.

Prince Frederik has given the symbolic order to start pumping carbon dioxide into the depleted Ninny West oil field in the North Sea.

The international consortium, which includes chemical giant INEOS and oil and gas producer Wintershall dea, has announced that the Greensend project in the Danish part of the North Sea will be the world's first transboundary carbon storage project.

Initially, gas in liquid form will arrive from the INEOS plant in Belgium, and later carbon dioxide from Denmark and other European countries will be stored, reports Beta.

After the trial phase, 1,5 million metric tons of gas will be pumped into the cavity 1,8 kilometers below the seabed every year, and the plan is to increase that amount to eight million tons a year by 2030.

A recent United Nations report states that carbon storage, one of the polluting "greenhouse gases", must be part of a range of solutions to reduce pollution and limit global warming.