I&M in energy efficiency [Trends in Future I&M]

Energy is around us, either from natural origin or created by humankind, and has deeply transformed our lives on how we interact with the environment. We take for granted, mainly in the developed world, its obtainability and almost endless supply. Just an example: we get 325,000 times more light from artificial sources now than at the end of the 19th Century, as any night satellite photo can confirm.