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?
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The “extra” plant matter should be composted, and used to replenish the nutrients back into the soil, and more importantly. The resources used to grow that plant is then restored to the source and more importantly feeds the ecosystem better. Remember the inputs into growing in soil are mostly from the sun, rain and carbon dioxide. They are a completely natural source of solar power and carbon capture.
