What is a wise and judicious use of all natural resources called?

Natural resources are categorized in many forms and available in multiple ways. They are renewable or nonrenewable sources of energy. We have to concern about the non renewable sources of energy because their continuous exploitation will lead us in trouble.

The wise and judicious use of natural resources is called natural resource conservation. The Limited use of non-renewable energy resources should be done, and dependence should be dragged towards the Renewable Sources.