Green beans, also known as string beans or snap beans, are an important farm crop grown mainly for processing to meet the expanding demand for convenience food. They belong to the family of common beans. Green beans are a common staple in households all over the world. They are a form of legume because the whole pod can be eaten with the seeds?unripe fruit. There are around 130 varieties of green beans recognized, but their nutritional content and health benefits remain similar. They are distinguished from the other varieties in that green beans are harvested and consumed with their enclosing pods.