Trees are a vital part of our environment. a, they bear a great impact on the climate. b we are not 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 it. f, our agriculture is dependant on rain. g, trees play a vital role on our climate. h, trees keep the soil strong. i, trees save us from flood j many other natural calamities.