Trees are a vital part of our environment. a, they bear a great impact on the climate. b we are not kind and careful about them. c, we destroy trees at random. d, one day the country will bear the consequence of greenhouse effect. e ours is an agricultural country, our economy depends on agriculture. f, trees play a vital role on our climate. g, trees keep the soil strong and protect it. h, trees save us from flood and many other natural calamities. i, trees provide us with timber which is of great use specially in construction works and for making furniture. j, trees are our best friends.