To Greatly expand the use of human energy to power the tools and appliances we use that are polluting the world. From vehicles for transportation, to refrigeration, power tools, buses and even human powered aircraft are possible, we only need to know how. So, first we'll discuss the many ideas and inventions that are already here, and attempt to arrive at an idea, that will make them more universally possible. Hold onto your hats, this is going to be a mind boggling journey... I promise!

http://tribes.tribe.net/humanpoweredeverything