Population pressure is usually denser in some places than in others. For simplicity diagnosing entrapment, we consider merely survival - in effect the 200 kg level. This is a necessary beginning. What the 'reasonable' or 'optimal' level might be is important - and the subject of much argument. For simplicity the figures consider only man, and assume that man is the only creature supported by an ecosystem.
Animals are inefficient energy converters.
When farm animals convert the energy stored in plants into that stored in their own bodies they waste a lot of it. The maintenance of biodiversity , both for its own sake, and for its use by man requires that man be not the only creature to be considered, and that the rest of creation should have its share. Hence the importance of game parks, etc. 6. The simplest economy can produce exports of primary products, particularly minerals, and timber, and high value agricultural exports, such as cocoa, and tobacco. But if more than minimal imports are required, they are likely to have to be produced by the export of manufactures, and services, such as tourism.