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.
Carbohydrates or âcarbsâ are an energy source in food that comes from starch, sugar and cellulose. Carbohydrates provide vitamins, minerals, antioxidants and fiber in the diet.The current recommendations suggest 45 to 65 percent of daily calories come from these types of foods.ou can find healthful carbohydrate sources in foods like wheat, corn, rice, oats, barley, quinoa, sorghum, spelt, rye and in fruits, vegetables and legumes. Read on to learn more about the importance of including the right type of carbohydrates in your diet.