Belgium: The European Commission will fund the research infrastructure ACTRIS-2 (Aerosols, Clouds and Trace gases Research Infrastructure network) with a total of €9.5 million until 2019. With long-term observations, ACTRIS-2 will contribute to climate-change research and the control of measures to improve air quality. A total of 31 partners from 21 European countries are participating in the ACTRIS-2 Kick-off Meeting, which is being held in Rome from June 3-5, 2015. It is hosted by the National Research Council (CNR) of Italy. The Leibniz Institute for Tropospheric Research (TROPOS) assumes coordination in the field of remote sensing and will operate the European Calibration Centre for Aerosol Physics in Leipzig, Germany. In addition, the institute opens its research station at Melpitz near Leipzig for international scientists to perform research projects.