Our fellow Jean-Marc Jancovici has been repeating it for a while, since the day he wanted to define the word frugality in relation to energy savings. He tells us that we can make these savings in 3 different ways, thanks to:
Efficiency. Here we make the production and use of a product (or a service) more energy efficient. In the end, we, the consumers at the end of the chain, can continue to use the product without change.
Frugality. It is by a voluntary choice that the person or the community decides to use the product less. There has been a saving. The ideal is to have chosen this change so ...