Space debris around Earth is a major hazard.

It is amazing to know that a paint chip 0.2 mm in size that was floating around in space managed to damage a space shuttle window. A paint chip so tiny that most would not even see it, assumes huge proportions when we assign a speed of 10km per second to it. At that speed a miniscule paint chip, nail part, a metal spring, etc., all of which are floating around Earth could break a satellite and cause fatalities to astronauts who are out of their space craft for routine EVAs – Extra Vehicular Activities – in short, a space-walk.