food is finite because of two reasons, one we do not have infinite land to grow infinit food. and two if land is over used it becomes dead and cannot be used any more. pardon me though you are correct we do have enough land to support alot more people. the grain feilds of the midwest for example, it has been estimated that if these lands were used to there full capsity that they along could provide enough food for 20 billion people over a number of years without going bad.

i am not going into the computer industry, i made that decision along time ago because i saw that the market was going to be flooded with workers.