> It’s theoretically impossible to save space with vertical farming if the power is to come from a renewable resource. The article talks about only solar panel

> It’s theoretically impossible to save space with vertical farming if the power is to come from a renewable resource. The article talks about only solar panels, but the conventional meaning of your statement would be that it's not possible with any renewable energy. Of course you can use e.g. nuclear or geothermal and save space.