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Financial and environmental pressures on modern agriculture have sparked new interest in vertical farming. With global population expected to exceed 9 billion by 2050, competition for land to grow both food and energy crops will become increasingly fierce
theguardian.com/environment/20…
The vaults rose up as high as the city walls, bearing reeds richly bedded in bitumen and gypsum. The layered galleries peered each beyond its neighbour to reach the sunlight, and water drawn from the river was pumped through conduits up to the highest level. The topsoil was thick enough to root even the largest trees...
These were the renowned Hanging Gardens of Babylon, as described by the Greek historians Diodorus and Callisthenes, and the earliest example of vertical farming – at least according to Dan Caiger-Smith. His company, Valcent, is taking the concept into the 21st century, recently launching the first farm of its kind at Paignton Zoo in Devon.
