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.
All carbohydrates (or carbs) are composed entirely of carbon, hydrogen, and oxygen atoms. They are often made up of a carbon spine with oxygen and hydrogen molecules, thus their name, carbo-(carbon)-hydrates(water) .They may contain ketones or aldehydes in their structure.imple Carbs (Cookies, chocolate, table sugar). The structure of carbohydrates (also called saccharides), is divided up into three major groups: Monosaccharides, Disaccharides, and polysaccharides. Monosaccharides are the simplest sugars, and make up all other carbohydrates.