rob don't worry. The Earth has been here for 36,000,000,000 years give or
take a year or two and man has only been here the thickness of a coat of
paint. Nothing, repeat nothing man can do will destroy this earth, spoilt it
yes, but like all wounds, it will heal.

Come back in 36 thousand million years and there will be no sign of man's
short inhabitance and everything will be OK

:-))

Mike