The CO₂ tax is also known as the CO₂ price or CO₂ pricing and, like any other tax, is set individually by a state. In Sweden, the CO₂ tax has been in place since 1991 and currently stands at 114 euros per tonne of CO₂ emitted. In Switzerland, Denmark, Finland and Slovenia, a CO₂ tax has also been standard for many years. In Germany, the CO₂ tax will be introduced from 2021 with an introductory price of 25 euros and will increase gradually. By taxing CO₂ emissions, the countries are pursuing the goal of making CO₂ emissions more expensive in order to achieve a reduction in CO₂ emissions.