In general, foods are made up of carbohydrates, proteins, and fats, each of which provide a different number of calories: 1  Carbohydrates provide 4 calories per gram. 2  Proteins provide 4 calories per gram. 3  Fats provide 9 calories per gram.
Importance of Water. Water is used for various important purposes: Water in Agriculture. Water plays the most important role in agriculture. Agriculture is impossible without irrigation throughout the crop season. Irrigation ensures proper plant growth.
Calories in Water and Health Benefits. Calorie Counts and Nutrition Facts. Water is essential for life because it helps regulate body temperature, maintain blood volume and your body uses water to transport both nutrients and weight. In fact, an adult's body is about 55 to 60 percent water and lack of water intake or increased water loss will result in dehydration.