the universal measure of power over time. Electrical energy is derived from electric potential or kinetic energy, and supplied by the combination of electric current (Amps) and electric potential (Volts) that is delivered by an electrical circuit (e.g., provided by an electric power utility).
A pillar of modern economies.
Can be created by cheap and dirty sources like oil.
Energy can be bought, saved, or made. A successful transition to 100% renewable energy will require a mix of all three.