In the current debate about a Federal Climate Change Act, people often overlook that in Germany about half of the federal states already have a climate change law as a comprehensive legal framework. In a study for WWF Germany, Ecologic Institute gives an overview over core elements of federal climate change laws and their impact on a potential Federal Climate Change Act. The study underlines the added value of such climate change laws. It concludes that climate change laws at the federal and state levels are not only compatible but strengthen each other. The study can be downloaded at the WWF website.