Deforestation means cutting down of trees in large number. In the name of modernization, man is cutting down trees in great numbers that has led to the destruction of great forests and the lives of many animals and plant species. We fail to realize that trees are the most important aspects of our planet and the existence of tress plays a vital role. Trees are our constant companies in our day to day life. We use them for various purposne We can not think of our homes, houses, residence etc. without trees. We use trees to make furniture, windows, doors for our domestic use. Again valuable furniture is made from the trees. We sell some pieces of valuable furniture to foreign countries. Thus trees add beaub to our dwelling places. But nowadays people are cutting down trees indiscriminately. The causes of deforestation are many, Bangladesh is the most densely populated country in the world. Its population is much more in proportion to its area. This huge number of population needs more shelter, agricultural land, fuel, furniture etc. For all these reasons people cut trees. Moreover there are some dishonest people who cut trees in our forests to make money. The effects of deforestation are too many to describe. This destruction distrubs our ecological balance. The existence of animals are going to be threatened. Due to deforestation carbon dioxide is increasing worldwide. As a result, the world is becoming warmer. The sea level is rising and many parts of the world is going to be engulfed by the sea in recent future. On the other hand, new areas of the world are turning into deserts as a result of deforestation. The removal of trees causes birds and other animals living on them to leave the place. It also causes serious damage to the soil, as trees give portection to soil as well. In the end, the soil gets sediment in the river bed and causes frequent floods. So, if we destroy trees at random, one day the country will turn into a great desert. All living animals and birds will not find any food or shelter to live in. They will be destroyed. There will be no rain and as a result our agriculture will face a great crisis. The temperature will rise and it will cause green house effect. The country will be unsuitable for living and various natural calamities like flood, drought, storm etc. will visit our country. As tiny drops of water makes the mighty ocean, we as individuals should take small steps to preserve the nature and make it's a greener world for the coming generations. We should remember, trees give us life and without them, it gets difficult for us to sustain. Seriously can we imagine a world without trees? No, definitely not. So we must all join hands to prevent deforestation, each in our little way. Our trees are our legacy given to us by our ancestors. So this is our responsibility t proteet the trees for the welfare of the human beings. Immediate measures should be taken to prevent deforestation. People should be mae aware of tree plantation through mass media. Tree plantation programme should be extended throughout the country.