A good food always does not mean a costly food. One should take food considering its food value. A balanced diet contains all ingredients of food-carbohydrate, protein, fat, vitamin, mineral salt and water. One should keep food covered so that flies, cockroach and other insects do not contaminate it. One should not drink polluted water. One can get of water-borne diseases only by drinking pure water.
Again, one can get rid of respiratory diseases by living in an environment which is free from air pollution. So, to keep in good health we need an environment which is free from air pollution, water pollution, noise pollution and menus pollution.