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.
By Alex Fir | Food Drink | Rating: Drinking water is one of the very most important things we can do to improve our health and to avoid a range of different health problems  though it often goes under appreciated. Water makes up over 60% of our body mass, and so as you might imagine its really rather important.