trees are important to us
trees are useful to man in three important ways: they give him wood and other useful things,they give him cool places, and they help to stop erosion causes by drought and flood
unluckily, in many parts of the world,man has not realized that the third service is the most important. he wants to make money from trees.he cuts them down in large numbers,only to find that he has lost the best friends he has ever had. he is often too lazy to plant and look after new trees , so the forests slowly disappear.
this does not only mean that man will have fewer trees. the results are even more serious:for where there are trees,their roots break up the soil to allow the rain to sink in. rocks also prevent the soil from being washed away easily by heavy rain, but where there are no trees , the rain will fall on the hard ground and flow away,causing floods and carrying away the rich top-soil. when the top soil is gone, nothing is left but useless desert.