Hurtigruten has found a novel way to be compliant with IMO 2020 - dead fish.
The Norwegian owner has said cutaways from fisheries and other organic waste will soon be used to power its fleet of green cruiseships.
They will use liquefied biogas (LBG) - a fossil-free, renewable fuel made from marine life.
"What others see as a problem, we see as a resource and a solution. By introducing biogas as fuel for cruiseships, Hurtigruten will be the first cruise company to power ships with fossil-free fuel," said Hurtigruten CEO Daniel Skjeldam.
Renewable biogas is a clean source of energy, considered the most eco-friendly fuel currently available, the company added.
Biogas is already used as fuel in small parts of the transport sector, especially in buses.
Northern Europe and Norway, which has large fishery and forestry sectors that produce a steady volume of organic waste, have a unique opportunity to become a world leader in biogas production, it added.
By 2021, Hurtigruten plans to operate at least six of its ships on a combination of biogas, LNG and large battery packs.
"While competitors are running on cheap, polluting heavy fuel oil, our ships will literally be powered by nature," said Skjeldam.
"Biogas is the greenest fuel in shipping, and will be a huge advantage for the environment. We would love other cruise companies to follow."
