CHAPTER III 
MAN'S AGRICULTURAL, FORESTAL AND ANIMAL NEEDS 
ANY attempt accurately to estimate the population- 
carrying power of the world, requires that account shall 
be taken both of Man’s agricultural and his forestal 
needs, and, as life is organised at present, account must 
also be taken of animals required for transport, for 
clothing, for food, and for other and minor purposes. 
There can be little doubt that as the world’s 
population-density increases, Man will become more 
vegetarian in his diet, for this will better economise his 
energy and the earth-space per capita which he must 
occupy. He will also use fewer animals for transport. 
Existing statistical returns for examining relevant facts 
are unfortunately by no means complete, but as regards 
existing numbers, the following have been recently 
recorded (1921), the unit being a million: — 
Year. Horses. Cattle. Sheep. Goats. Pigs. Total. 
(911 89:1 539-0 4466 107-6 158-2 1340-5 millions. 
1921 99-8 10-9 532-2 116-8 2087 1468.4 
Besides these, are those animals of which no record 
has yet been obtained. There are also considerable 
numbers of asses, buffaloes, camels, caribou, deer, 
elks, elephants, llamas, reindeer, etc., for some of 
which there are no statistical records whatsoever. 
For 1922, the number of 36:40 million buffaloes 
was recorded and also 1-14 million camels, but these 
were not the complete totals. The aggregate for 
the larger animals probably closely approximates to 
the 1950 millions representing the human total, and 
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