Space debris mitigation: the case for a code of conduct   Up to now more than 180 explosions and 1 collision in space have been recorded. Further explosions and collisions are most likely. The explosions are mainly caused by onboard energy sources, either due to a pressure build-up in propellant tanks, battery explosions, or the ignition of hypergolic fuels. Each explosion creates thousands of small debris objects. Explosions in space       Up to now more than 180 explosions and 1 collision in space have been recorded. Further explosions and collisions are most likely. The explosions are mainly caused by onboard energy sources, either due to a pressure build-up in propellant tanks, battery explosions, or the ignition of hypergolic fuels. Each explosion creates thousands of small debris objects.   It is crucial to start right away with the implementation of the mitigation measures. We have simulated the future GEO environment in case no measures are taken. This is named the "business-as-usual" scenario. In the top panel 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 need to be taken. In the long run, spacecraft and rocket stages will have to be returned to Earth after completion of their mission.   Release date: 15 April 2005