Just a thought,
Say tomorrow you woke up and EVERYTHING man-made was gone (cars, bridges, roads, buildings, etc, I mean EVERYTHING) All that is left is the population of the world as it stands right now and a blank Earth.
With all the knowledge and technology we have at the present day, how long do you think it would take society to "re-build" itself back to the where we are right now in 2004.
I am guessing about 25 years.
What do you think?
P.S. Can't you tell I am busy at work?
