The ideal answer is compost, regenerative agriculture, and (better treated) human-sources waste.

Organic crop yields will almost certainly reduce a bit without animal waste fertilizer, but that is fine since crop consumption will fall by a greater amount due to not needing to feed a bunch of extra animals.

The US is the world’s largest oil producer. The US, however, does not export the most crude oil, but instead exports large quantities of refined products (gasoline, diesel, etc.).

The US was the largest exporter of liquefied natural gas in 2023.