Trees are our best friends. They play a very important role in our life. We can not live without them. They give us timber, paper and firewood. Timber is used in making houses, train compartments, big boxes, tools etc. Without paper life may be difficult for us. Paper is necessary for study and writing. People in villages use firewood to cook meals. They use wood to build houses, huts, carts and agriculture tools. Trees also give us food, gum and medicine. They also add to the beauty of life. Gardens can not be charming without them. We need them for oxygen and good health.
Trees also help to control pollution: They absorb carbon dioxide. They improve our environment. They cause rainfall and protect water resources under the ground. They prevent floods and droughts. Therefore, we should try our best to grow more trees. Govt. and social welfare societies should start a movement. There should be awards for those persons who grow more trees.
Trees are the largest and longest living organisms on earth. To grow tall the tree has become a miracle of engineering and a complex chemical factory. It is able to take water and salts out of the earth and lift them up to the leaves, sometimes over 400 ft above. By means of photosynthesis the leaves combine the water and salts with carbon dioxide from the air to produce the nutrients which feed the tree. In this process, as well as wood, trees create many chemicals, seeds and fruit of great utility to man.
Trees also remove carbon dioxide, the main greenhouse gas, from the air. Trees are of continued importance to the environment. Tropical rain forests have of particular significance; although they now occupy less than 6 per cent of the land surface of the earth they probable sustain more than half of the biological species on the planet. Notwithstanding the debt we owe to trees, their emotive power, and their importance to other forms of life, the forested area of the earth is steadily being depleted. This is leading to the degradation of the environment and the extinction of many species. There is now a real danger that in the not very distant future man will destroy a large proportion of the present population of species on earth, create an uninhabitable environment, and then die out himself.
