Produce plays an important role in California cuisine. California encompasses many diverse climates and therefore is able to grow many types of produce. Additionally, California's Central Valley contains some of the most fertile soil in the world. California is the number one U.S. producer of many common fruits and vegetables, including broccoli, spinach, tomatoes and avocados, amongst others. A health-conscious culture also contributes to the popularity of fresh produce. Fruit festivals, such as the National Orange Show Festival in San Bernardino County, are common throughout the state.