My gut feeling is that it's hard to see how this can be efficient on a large scale. The 10% water is impressive, but it's weighed against: - cost of buildings

My gut feeling is that it's hard to see how this can be efficient on a large scale. The 10% water is impressive, but it's weighed against: - cost of buildings - cost of climate control for the growing areas - cost of electricity, for the artificial light and all the gadgetry needed to keep it running