Rapid utilization of non-renewable resources reduces their availability for future generations. We must investigate ways to reduce the rate of such utilization and consider the use of alternate resources. E. Alteration of Natural Systems 1. The living world is a closed system that has cycles of energy transfer and matter flow. The world's biodiversity is rapidly disappearing.
Biodiversity is the variety of life at all levels of biology.
Not only does biodiversity enhance the quality of our lives aesthetically and practically, it is part of our life-support system. Change is a part of natural systems. Physical and biological changes in the world affect each other. Human activities have increased the rate of change with sometimes devastating effects on natural systems. These processes are the result of biological evolution in an ever-changing environment as evidenced by history.