Find out how much cellulose is made by all the plants in the biosphere and compare it with how much of paper is manufactured by man and hence what is the consumption of plant material by man annually. What a loss of vegetation!
EXPLANATION The vegetation provides a barrier which is between the water and the land. One simple measurable estimate of vegetation loss can be defined by subtracting vegetation cover on the campsite from the vegetation cover which is on the undisturbed site. 100 billion tonnes of cellulose are made per year by all the plants in the biosphere. It will take 17 full-grown trees to make one tone of the paper. Trees are also used to fulfill the other requirements of man such as timber, food, medicines, etc. Hence it is difficult to calculate the annual consumption of plant material by man. FINAL ANSWER The answer is : 100 billion tonnes of cellulose is produced and 17 full-grown trees are used to make one tone paper. We cannot calculate the annual consumption and also the vegetation loss.