Originally Posted by
ericy
But without petrochemical fertilizers and pesticides we can no longer produce anything like these quantities of food. I have seen estimates that in the absence of oil, that the maximum sustainable human population is closer to 1.5-2 billion.
Where did you see these estimates? They are probably from BP, and they're definitely BS. Organic farms, properly managed, have higher yields per acre than the old fashioned petroculture farms. Try not to believe every lie the industrial marketers tell you!