| Popis: |
In satisfying its needs Mankind uses the Earth’s physical resources and fossil energy and produces products that very often are recalcitrant to biodegradation. As the earth is a closed system, the amount of matter is constant and can be recycled, although this may cost very large amounts of energy. The fossil energy reserves of system Earth, however, will simply be exhausted sooner or later. How soon this will be depends on the growth of the human population and the way it uses the Earth’s resources. |
