It is crucial to that we start immediately to implement mitigation measures. This image shows a simulation of the future GEO environment in the case when no measures are taken; this is the "business-as-usual" scenario. In the top panel, with mitigation measures, a much cleaner space environment can be observed, if the number of explosions is reduced drastically, and if no mission-related objects are ejected. However, to stop the ever-increasing amount of debris, more ambitious mitigation measures must be taken. In the long run, spacecraft and rocket stages have to be returned to Earth after completion of their mission.