"It is the essence of recycling," says Joan Gussow, nutritionist, gardener, and author of "Growing, Older" and "This Organic Life." If you have to compost indoors, worms will make it quicker and (believe it!) less stinky. They can eat "green" matter and produce castings of vermicompost (that's good, clean dirt) in three to four months. Layer components from the bottom up as shown.