Comment by eadan

The problem with vertical farming is where does the energy come from? An acre of solar panels is not capable of supplying enough energy to grow an acre of crops, even with the efficiency gains we've had in photovoltaics and lighting with wavelengths tuned to crop growth. What's the point in having fields of solar panels when we could have smaller greenhouses filled with crops? If only nuclear energy was politically viable in the west we could have vertical farming and so much more.