Did you know: Celery will regrow from the base if placed in a glass jar with a little water. Some other veggies to try this with are certain varieties of lettuce (Romaine for exampe) in a shallow pan and the ends of green onions potted in dirt.
Growing Mushrooms In A Laundry Basket - great way to grow mushrooms outdoors if you have a shady place that gets watered regularly… Great for an emergency food source or just save money at the grocery store.
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.