Crops can blight, animals can get diseases. I don't know much about hydroponics but I know that bacteria are a concern. What food source is the most reliable, the least likely to produce less food than expected?
Crops can blight, animals can get diseases. I don't know much about hydroponics but I know that bacteria are a concern. What food source is the most reliable, the least likely to produce less food than expected?
Anything living can get diseases. I'd still go for crops grown in a controlled, indoor environment.
There's a way to grow bacteria on natural gas if you don't have grow lights, and they used it to make fish feed for at least a while, as well as some lab work on electricity-eating bacteria. If you don't care about your liver I guess this drink is also technically a source of calories with no biological production needed.