human energy, Tag

The choice of low environmental impact sources of energy is one of the founding principles of sustainability, but many people often forget that we have the potential to create energy via our own physical activities: walking,...

Guest Post by Willis Eschenbach For a while, I taught a course in human-powered machinery for the Peace Corps. You know, bicycle powered generators, treadle powered pumps, that kind of thing. One of the very rough rules of...

Poo power is rapidly becoming the energy source of choice in many countries, powering everything from homes to motorcycles. Now scientists from Nanyang Technological University (NTU) have invented a new toilet system that...