A project that turns captured carbon dioxide into food for farmed fish is to be tested in Norway.
It involves producing Omega-3 fatty acids from algae that will be grown in a stream of CO2 at a test facility.
At present the oil is produced for aquaculture from low value fish or krill caught in the waters of Antarctica
But the new technique could absorb the gases responsible for global warming while providing sustainable fish food.
Seafood is Norway’s second largest export after oil and gas, valued at over $10b in 2013.
The fjords produce around 60% of all the farmed Atlantic salmon in the world.