Vertical farming in Vietnam gets praised as the future of agriculture, but I question whether it can truly replace traditional rice paddies for staple crops. The energy costs alone for indoor lettuce are roughly 10 times higher per kilogram than field-grown, and we haven't cracked the capital investment problem for medium-sized farms. I've seen two pilot projects near Da Nang shutter within three years because operational expenses outpaced revenue. Maybe vertical farming works for high-value herbs in urban centers, but claiming it feeds the nation is a stretch.