Hydroponics simply means working water ("hydro" means "water" and "ponos" signifies "labor"). Many distinct civilizations have used hydroponic growing techniques: hanging gardens of Babylon, the floating gardens of the Aztecs of Mexico and people of the Chinese are cases of 'Hydroponic' culture. Hydroponics is of course a new way of growing plants. Hydroponic gardening can be VERY complex, with sensors and computers controlling...