Q.13:- 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!
As per a UN report of 2006, about 312 million tons of carbon is stored as biomass of plants. About 10% of the total available cellulose is used in paper making. This appears as a small figure; compared to the total biomass. But when the lost forest cover is replaced by monoculture plantations, it makes the situation grim. Moreover, wood is also cut for many other purposes. Hence, there is a huge loss of vegetation every year.