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Scientists have that the volume of debris floating in space is becoming a danger to the International Space Station (ISS). Experts say that the time has to start cleaning it up. America’s space agency NASA estimates that there are around 22,000 in orbit that are big to track. These include like spent booster rockets and old satellites. They also say there are smaller pieces of scrap that could damage the ISS, space ships travelling to it, and -million-dollar satellites. It is such a big problem that the ISS occasionally has to out of the way to avoid being hit. Donald Kessler, a retired NASA scientist said, "We've control of the environment."

Space agencies have up with many plans over the few decades to address this problem. Agreements to restrict the of new space junk had been working. These agreements are supposed to that anything sent into orbit eventually back to Earth and burns up. However, in the past four years, the amount of space junk has . In 2007, China blew up a satellite in a missile , and in 2009 two satellites crashed in orbit. These two events changed everything and effectively made previous agreements out of . There have been several suggestions on how to clear the junk. These include launching large magnets or putting nets into space to catch dangerous items.