- If you run on liquid biogas, you have a reduction of 80 percent. By then we have already reached the climate target of 70 percent, says Claes Westling at the Finnish state-owned company Gasum, which is building 25 stations in Sweden.

Liquid biogas or liquefied natural gas differs from the compressed vehicle gas that motorists think today. The gas is cooled down to about –160 degrees and takes up less space in the tank. On a tank, a truck comes as far as a diesel engine.

Builds more stations

Both Volvo and Scania today have special truck models that can be driven on the liquid gas, which requires special tanks. There are still few gas stations, in northern Sweden only one in Östersund, which opened in mid-November.

- We will build 50 stations in the Nordic countries by 2020, 25 of them will be in Sweden, says Claes Westling at Gasum.

A station in Umeå is planned to be ready in January, where customers will be able to refuel both liquid and compressed gas, ie a station for both motorists and truck drivers. Later in 2020, construction will follow in Kiruna, Luleå, Skellefteå and Sundsvall.

The biogas is transported from Norrbotten

The biogas will be transported to Umeå by gas-powered truck from Gasum's biogas plant in Torneå. But there are also plans to build a biogas plant in Umeå. Waste is available so it is sufficient, according to Westling.

Isn't there a risk that biogas will run out and customers will have to refuel natural gas instead, which is fossil?

- I don't see it as a problem, there is biogas to buy on the market. There is a surplus in Norway. We have secured our stations until 2021, says Claes Westling.