To what extent is "energy" ever supplied? Is it not rather goods that are capable of producing energy in certain circumstances?
However, usable energy (also known as Free Energy in Thermodynamics) is destroyed or (hopefully) consumed, and is not conserved but degraded. That's the Second Law of Thermodynamics. And in this sense yes, energy in usable form (often using a low-entropy form of matter as carrier) is produced. Most economists teach a theoretical framework that has been shown to be fundamentally useless. -- James K. Galbraith
Examples of goods: (Thermodynamic Free) Energy, (neg)-Entropy, Space/Size, (amount of) Matter, electrical charge/current, magnetic moment (i.e., strength of a magnet).
Examples of services: Temperature, Pressure, surface/linear Tension, electrical Voltage, magnetic Field.
Hah. Most economists teach a theoretical framework that has been shown to be fundamentally useless. -- James K. Galbraith
