Jean-luc: That is VERY interesting how you were exposed to all those doomsday predictions in the seventies - SO WAS I! I've never heard anyone else talk about it. I never thought about it as "prophecy", but i guess it was in a sense.
I picked up the same ideas as you did - very soon there would be no water, too much solid trash to deal with, air pollution, and of course overpopulation, and famine and other disasters because too many people. Oh, and nuclear war, radiation ,etc.
Later as an adult, it hit me like WTH?? What could i do about all that as a kid? And did they ever stop to think about the effects of that on kids who would take it seriously, without any counter-balancing information, thinking skills, etc.??!!! Some that already had a tendency to depression could have become suicidal.