Human Materials Production as a Process in the Biosphere
Materials such as metals and concrete are not renewable. Man's problem is to devise cycles that will conserve resources of this kind and at the same time prevent their accumulation as solid waste
The Age Of The Solar System
Rocks and meteorites contain radioactive elements and the products of their decay, the laborious analysis of which presently indicates that the earth and its neighbors were formed 4.5 billion years ago
Books
A geochemist views Immanuel Velikovsky's unconventional theory of the earth's history