Re:Confused (Score 2, Informative)

Actually, black holes as small as you're describing would evaporate very quickly due to Hawking radiation. I suspect that any black hole up to the job of clearing out space debris would present serious dangers to the atmosphere, but I haven't done any calculations. Hand-waving justification: to effectively clear things, it would have to have enough mass to 'accelerate' (I know this term is incorrect from a strictly GR standpoint) objects toward it, in which case the tidal forces would be significant.