Energy conservation is the principle that energy cannot be created or destroyed. Energy can change from one form to another. This idea applies to all physical systems. It is a key concept in science.

Energy conservation is observed in natural and human-made processes around the world. It is used in science and engineering to describe energy in systems. Different forms of energy can exist and change within the same system.

This principle is part of physics and scientific study. It is used to describe how energy behaves. Energy conservation applies in many environments and situations.