To me it is growing food, and using what is around - not expending unnecessary resources. I think it involves some reciprocity too. Three families, (friend, son and next-doors) give me their veggie scraps, most of which go to the chooks, some direct to the compost bin. I give spare produce to them, and bones to next-door's dog. I let their children play in our back yard - it has trees, overgrowth and interesting corners which they love. Their Dad helps my husband, who has arthritis, with any jobs involving a ladder. Oh yes, he gave me two new polystyrene boxes the other day as I use them to grow herbs. I also do a bit of scavenging, or recycling if I want to be posh: nothing gets wasted.