In February
2008, for example ,the United blew up a satellite that contained toxic fuel .was exploded over the Pacific Ocean so that it couldnot fall and harm humans. Some scientists speculate
that one day there might be orbiting “garbage collector” machines to pick up the debris.
Since the space surveillance mission began,almost 17,000 objects that were tracked reentered Earth’s atmosphere. Most objects that reenter the atmosphere either burn up or reenter over water. As a result, the risk of someone getting hit on the head by one of these objects is very remote. Nearly three-quarters of the planet is covered by water, and large areas of Earth’s land are uninhabited.