[lcam84]

We could avoid this number by investing in soil preservation, nitrogen fixing plants, reduce meat consumption, even in concepts like humanure.

[ahartmetz]

None of these would produce as much food per area and time. Reducing total calories required by eating less meat is a different argument.

[lcam84]

Didn't said that we can substitute industrial ammonia but it could definitely reduce it's use. Changing the way we eat it's definitely an opportunity to reduce major sources of c02 emissions.