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 To Our Survival Water Scarcity & the Importance of Water Introduction: This report has been written to inform you of the world... water crisis which is getting worse every second. It has also been written to inform you about the water scarcity and importance.