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.
1 Importance of Glaciersâ¢ Help to keep the Earth coolâ¢ Contain most of theavailable drinking water onEarthâ¢ Provides a habitat for manyanimalsâ¢ Should the glaciers continueto melt, everything will beaffectedâ¢ http://www.dismuse.com/wp-content/uploads/2010/10/Glacier2_p.jpg. 2. 2  Importance of Glaciersâ¢ Help to keep the Earth coolâ¢ Contain most of theavailable drinking water onEarthâ¢ Provides a habitat for manyanimalsâ¢ Should the glaciers continueto melt, everything will beaffectedâ¢ http://www.dismuse.com/wp-content/uploads/2010/10/Glacier2_p.jpg.