
EnvironmentSeptember 1, 1970
The Biosphere
Introducing an issue on how the earth's thin film of living matter is sustained by grand-scale cycles of energy and chemical elements. All of these cycles are presently affected by the activities of man

The Biosphere
Introducing an issue on how the earth's thin film of living matter is sustained by grand-scale cycles of energy and chemical elements. All of these cycles are presently affected by the activities of man