I think we should go harder into mycoculture and Insectivory. We can grow mushrooms or other fungus on our plant waste like wood, paper, and food scraps. We can also feed soldier flies, grubs, ants, termites or grasshoppers on farm and food waste.
Insects and fungi are also WAY more efficient than mammals like cows, or reptiles like birds. And they can both use waste material from agriculture without using up resources that we ourselves could use for ourselves. Fungi can be grown in the pitch black, so that reduces energy consumption. Many insects can be grown in far denser populations that like cows or chickens, and they don't have nearly the same level of consciousness (that we know of) as cows or other mammals. So, even if we are still killing them, its arguably less unethical.
On top of that, consumption of insects has way lower risk of disease. Salmonella, worms, prions, etc. You can get those and others from mammals and birds, but insects are so different from us that it's a lot safer for the most part. That being said, there might still be some risk we haven't identified yet.
