All you need is a small amount of vertical space around a balcony or an open window which can hang or store a vertical array of drink bottles that can grow all your herbs and lettuce easily. Recycle as many of your plastic drink containers.
GREEN ZERO by Studio di Architettura Daniele Menichini
I wish more people understood what the word "sustainable" meant instead of thinking its just some word associated with being green. Air, Water, Waste, Food, Energy – Designers Imagining Self-Contained Living Systems