while not the awnser s/he was looking for (as i agree with the above transportation/technology awnser above. it used to take months to go from a to b now hours... hence smaller) as long as the population is growing, there is less 'earth' per capita for each of us.
Again, not--i dont think the awnser that was sought--just throwing it out there as an aside. and HEY! THATS MY CHUNK OF WATER!! lol.
anyway i suspect a troll. lol
How inappropriate to call this planet Earth when it is quite clearly Ocean ~ Arthur C. Clarke