An article on cooking efficiency from Low Tech Magazine and their study on thermal efficiency of different methods of cooking. Rocket stoves are mentioned and rank very high in both thermal efficiency and decreased water boiling time compared to other methods of cooking.
Yeah, that quote was one of my favorites too. I have taken undergraduate and graduate thermodynamic classes and I see so many insane uses of energy it hurts.
I brought this back from the farm where they grow the tiny ads:
Heat your home with the twigs that naturally fall of the trees in your yard