Like I said the predictions that we will be running out of the 'easy stuff' for a long time.   I remember them from my debate club in the 70's.   I also remember claims that we were going to enter an ice age.   Forgive me that after 40+ years of alarmist outcry I do not get excited at the cry of the sky is falling.   Most of this gloom and doom were supposed to have happened by now.