[UncleOxidant]

Sure, but it would take some time to transition to ramp up production to the scale required by world-scale agriculture. We're using petroleum for this because it was cheap & easy. Not saying we can't transition, but it will take time.

[ch4s3]

Right, but it's possible with existing tech and there's no scenario where oil disappears all at once. Its a highly geographically distributed resource.