This animation shows a simulation of the future LEO environment in the case when no measures are taken ("business-as-usual" scenario) compared to measures being taken; With mitigation measures, a much cleaner space environment can be seen − but only 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.
It is crucial to that we start immediately to implement mitigation measures.