Over 60 percent of the world's population lives in urban areas. Even if only a few people wanted to grow some of their own food, a lot space would be needed for planting. Now you'll learn about various garden concepts such as community gardens, collective gardens, the SPIN garden, and community-shared agriculture as urban options for growing some of your own veggies. Read on to discover spaces such as school yards or grassy areas on the street that may have potential in becoming productive urban gardens.