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Karlsruher Institut für Technologie (KIT) ) Greenhouse gases and pollutants as well as natural causes such as volcanic eruptions have an impact on the Earth's atmosphere. To study these processes in detail is the objective of the CAIRT satellite concept that researchers at the Karlsruhe Institute of Technology (KIT) and their partners have developed. The European Space Agency ESA has selected CAIRT as one of four candidates for a mission for scientific earth observation.