There is a lot of environmental friendly food that is underutilized because it does not scale to current level of consumption. We have lakes that because of eutrophication is overpopulated. We have biodiversity important grass regions where nation use fossil fueled machines to keep open. We have regions where the only farming possible is animals that eat lichen. There is invasive species which nation pay hunters to kill and throw away the meat because its not economical to sell it.

We are no where near tapped out on unscaleable food sources that has a positive effect on the environment, and yet we put zero resources on it just because we consider it unscaleable. The result is that we do nothing and put all our hope that in the future some scaleable solution will fix everything. That does not sound rational approach when the problem of environmental catastrophe is already here.