In the course of the project, 100 gas buses will be introduced in the city of Tallinn, when providing regular public transport services, which, if possible, will consume only biomethane as fuel. The project will result in a greater use of renewable energy as transport fuel and reduced CO2 emissions into the atmosphere. The project will generate a higher demand for biomethane, thus triggering renewable energy production and reducing dependence on oil. A partial switch from diesel to biomethane will help to make Tallinn’s airspace better stored.