They're in such a low orbit that they're barely staying in space already. You could explode all Starlink satellites right now and all their debris would naturally fall back into the atmosphere and leave the orbit clean in just a few years at most.

Trapped on earth? Just where do you think we are going to go? Contrary to what you have been told, we are no where near colonizing mars. Or cloud cities on venus, which is more practicable it appears to me. Society will fall apart long before we get there, glances at clock...