Orange trees are widely grown in tropical and subtropical climates. Specifically sweet orange, is a citrus fruit belonging to the Rutaceae family which also includes pomelo, tangerine, and grapefruit. Oranges are a very good source of vitamins, especially vitamin C,Orange is low in calories, contains no saturated fats or cholesterol, but rich in vital antioxidants, dietary fiber. Orange juice is an important part of many people's breakfast.