This note is a part of my Zettelkasten. What is below might not be complete or accurate. It
is also likely to change often.
If a technology increases energy efficiency, it leads to a reduction of the consumed resource, lowering the relative cost of using it (example: more travel with the same fuel).
Law of demand states that if cost of an item decreases, its demand will increase. This is the Rebound Effect.
The amount of rebound depends on the Price Elasticity of the resource consumed.