Using the second lay of thermodynamics, way energy cannot be recycled?

Some energy is lost to entropy increase, and entropy is unusable energy.
http://hypertextbook.com/physics/thermal/thermo-second/

The second law of thermodynamics states that in any natural process, the total entropy of a system and its surroundings always increases. Entropy is a measure of how disordered or random a system is, and it is closely related to the concept of energy dispersal or energy spread-out.

According to this law, energy tends to flow from areas of higher concentration to areas of lower concentration until it reaches a state of equilibrium. When energy flows, it tends to become more spread out and less concentrated, which means that some energy is lost in the form of heat.

This means that energy cannot be fully recycled because some of it is lost as heat and becomes unusable for doing work. In other words, through natural processes, energy becomes more dispersed and less concentrated, leading to a net increase in the overall entropy of the system.

However, it's important to note that while energy cannot be recycled completely, it can be converted from one form to another. For example, heat energy can be converted into mechanical energy or electrical energy. So, while energy cannot be recycled in its entirety, it can still be transformed into different forms that can be used for various purposes.