Trees are our great friends. They are very important for the survival of animals and human beings. They give us cool and refreshing shade. They give us fruit to eat, firewood to burn, timber to build houses and furniture. They replace the carbon dioxide in the atmosphere and thus support the life of living things. The green leaves of trees produce starch which is an essential part of the food of men and animals. Trees help in causing rain. Trees prevent soil erosion. They supply different kinds of raw material for many of our industries. There are trees, which supply us with valuable medicines. In South America, the sap of the cow-tree is used as milk. Trees provide shelter to thousands of birds and animals. The paper we write on is also made of wood we get  from trees growing in hillside. The rubber tree gives us a sap, which is made into rubber. Trees are also valued for their beauty. They lend beauty to the scenery. In older days, Rishis and their pupils lived in forest homes in the company of nature. Trees also give us firewood, which is used as fuel in many household. Thus, trees supply us with innumerable useful things. They have a great importance for us. They should not be cut or destroyed. They are one of the nature’s greatest gift to mankind.