The Potsdam Institute for Climate Impact Research (PIK, in German: Potsdam-Institut für Klimafolgenforschung) is a research institute funded by the German government that deals with key scientific issues in the fields of global change, climate change, and sustainable development. Ranked among the best environmental think tanks worldwide, it is one of the leading research institutions and part of a global network of scientific and academic institutions working on global environmental change. It is a member of the Leibniz Association, whose institutions carry out research on topics of great importance to society.