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.
The Importance of Water Resources 11 Pages. 2677 Words. Water is singly the most important element to the world as a whole. It is the lifeblood of the environment, essential to the survival of all living things whether it is a plant, an animal or humans (Environment Canada, 1996).