Alliance 90/The Green Party are known as the “Party of Ecology”. Protecting the environment runs through its political DNA. In voter surveys, the German Greens regularly come out as the party deemed to have by far the greatest competency in this area and in energy policy as well. But is that justified? Does it make any difference who is in power in a country? This study by Arne Jungjohann tries to answer these questions, as it looks at the subnational level of the federal states.