What is sustainable management? Why is reuse considered better in comparison to recycle ?

Sustainable Management: It is a pattern of management that promises the use of natural resources in such a way that they meet the human needs in the present as well as in the future.

Advantage of Reuse over Recycling
Recycling requires a large amount of energy and money. Reuse, on the other hand,  simply involves using things, again and again, preserves the embodied energy originally used in manufacturing an item. Reuse also creates less air and water pollution than recycling. Hence, reuse is preferred over recycling.