The world “renewable” has quickly become a synonym of words like “clean”, “environmentally friendly” and “sustainable” in our language. Even the companies and governments have used it with commercial, informative and even propagandist goals. The truth is that “renewable” stuff is part of contemporary life since some years ago, especially when energy is involved.

Forget about Boltzmann or a room full of ping-pong balls flying everywhere or a little devil called Maxwell’s Demon. As an engineer, I  have always heard enough about the nano/microscopic description of things in order to learn (or at least listen to an explanation of) how stuff works, especially important stuff …