Most everyone knows that we use proteins, carbohydrates and fats for energy. Calories are measurement of a unit of heat or food energy. For example, we can achieve four calories per gram of proteins and carbohydrates, and nine calories per gram from fats.
Tree Variety. Virginia pine (Pinus virginia) is the major Christmas tree species for the acidic soils found in East Texas. A grower can produce a 6- to 8-foot Virginia pine Christmas tree in 3 to 5 years, depending on soil and climatic conditions.
Types and Names of Live Christmas Trees. There are two main types of Christmas Trees, see List of Natural Live Christmas Tree Names and List of Artificial Christmas Tree Names. Christmas Trees are evergreen trees that are decorated in the celebration of Christmas. They may also be called Yule Trees.