natural gas & oil. Duke Energy operates a system of generating plants fueled by oil or natural gas, including combustion turbines, combined-cycle units and oil-fired units. Combustion turbines. Many of our combustion turbine units are used to supplement power supply during peak demand periods when electricity use is highest.
Carbohydrates are a type of macronutrient found in many foods and beverages. Most carbohydrates are naturally occurring in plant-based foods, such as grains. Food manufacturers also add carbohydrates to processed foods in the form of starch or added sugar.Common sources of naturally occurring carbohydrates include: 1  Fruits. 2  Vegetables.3  Milk. 4  Nuts. 5  Grains. 6  Seeds. 7  Legumes.ood manufacturers also add carbohydrates to processed foods in the form of starch or added sugar. Common sources of naturally occurring carbohydrates include: 1  Fruits. 2  Vegetables. 3  Milk. 4  Nuts. 5  Grains. 6  Seeds. 7  Legumes.
There are three types of carbohydrates: starch, sugar and fiber. Starches and sugars provide your body with its main source of energy. They're all comprised of carbon, oxygen and hydrogen, which are organized into single units.gain, sucrose is just table sugar, and it occurs naturally in several fruits, grains and vegetables. Lactose is also a natural sugar, and it can be found in milk and other dairy products. Maltose forms naturally when starches break down from complex carbohydrates into simple sugars.