Trees are useful to man in three very important ways. They provide him with wood & other products; they give him shade; and they help to prevent drought the floods. Trees bear a great impact on the climate. If we destroy trees at random, one day the country will turn into a great desert. Again there will be no rain & as a result the country will face a great crisis. Trees keep the soil strong. Trees save us from flood & many other natural calamities. Trees prevent the rise in temperature. They give us oxygen. They prevent the rise of carbon-dioxide world wide. Thus trees maintain ecological balance. Trees give us food & shelter. They make the land fertile. We get timber from trees. This timber is used in making houses, boats, ships & furniture etc. They save the house from cyclone. They also give shade to protect us from the scorching heat of the sun. Many trees give us fruit. Trees help to cause rain. They prevent a region from becoming desert. Trees provide shelter to birds & beasts. Trees are things of beauty too. We can take care of trees by not cutting them. We can also take care of trees by planting them more & more. We should plant trees more & more for a better, happier & healthier life.
Physical exercise means the regular movement of the limbs of our body according to rules. It is essential to keep our body fit & mind sound. There lies a close connection between body & mind. We can not think of a sound mind without a sound health. It is physical exercise which enables us to build a good health. Physical exercise makes our body active & the muscles strong. It also improve our power of digestion and blood circulation. It gives strength to our brain. A machine gets rust for want of proper use. Human body is also a machine. It becomes inactive & weak for want of exercise. So we should take regular physical exercise in order to maintain a sound health and lead a happy life.
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