Abstract
Modem economics relied on the false presupposition that natural resources are free goods. It gave rise to exaggerated expectations on the side of economists concerning the possibilities of economic growth. I try to interpret the terms of natural resources, sustaining capacity, production from a human-ecological platform. The quantity of natural resources may vary within a large spectrum between absolute abundance and total exhaustion. The support capacity can be raised in different ways. Extensive growth is wrong while technological development is a good way. So, certain technological-market processes aiming at extensive growth must be suppressed, processes that could increase effectivity and technical developments, which would draw new resources into production, should be supported.