FRANKFURT, Germany (AP) — Germany's Daimler Truck AG and Sweden's Volvo Group say they plan to jointly manufacture hydrogen fuel cells for trucks in Europe starting in 2025 and called on European Union policymakers to boost incentives for climate-neutral technologies.

The companies said Thursday their fuel cell joint venture, cellcentric, is carrying out preparatory work at a facility in Esslingen, Germany and that a decision on a location for large-scale series production will be announced in 2022. Daimler Truck and Volvo said they plan to start with customer tests of fuel-cell trucks in about three years and to launch large-scale production by the end of the decade.

The companies called on European policymakers to add incentives including taxing carbon and emissions trading to make up for the fact that climate neutral trucks would be more expensive. They backed calls for 300 high-performance hydrogen refuelling stations for heavy-duty vehicles by 2025 and 1,000 stations by 2030.

European governments are seeking to lower emissions of carbon dioxide across their economies under the 2015 Paris climate accords, which aim to limit global warming and climate change. Carbon dioxide, which is a product of internal combustion engines among other things, is the main greenhouse gas blamed by scientists for climate change. Efforts to limit emissions from passenger cars in Europe has focused on the introduction of battery-powered cars. Daimler and Volvo, however, said that while batteries will work for short-haul trucks, they see hydrogen fuel cells playing a role for heavier loads and longer distances.

In a fuel cell, hydrogen and oxygen combine to produce electricity, heat and water. There are no carbon dioxide emissions or smog-producing pollutants. Hydrogen can have advantages over batteries in terms of weight and range but places to refuel are expensive to build and currently few and far between.

The two companies said that they would remain competitors in developing new truck models even as they cooperate on the fuel cells that would power them.

Daimler Truck, maker of Freightliner and Western Star brands, is slated to be spun off later this year from Stuttgart-based Daimler AG, which manufactures Mercedes-Benz luxury cars.