Pinner said--I built one of these for a sixth-grade history project back in the day; How to build a crossbow.-- this would be cool to build
Pump Fire Drill The Iroquois invented this ingenious pump drill, which uses a flywheel to generate friction. The crossbar and flywheel are made of hardwood; the spindle and fireboard are made from softwoods (as in the ha
you could add some fish to your water reclamation tank for a small aquaponics system. Grow a few plants to feed the fish and this forms a closed system. There is no need to fertilize, the fish do it for you! Permaculture at its finest!
Go Green 4 Health. Good Tips On How To Take Advantage Of Solar Energy. Solar power has been around for a while and the popularity of this energy source increases with each year. Solar energy is great for commercial and residen
Using an automotive alternator to construct a wind-powered electrical generator can reduce or eliminate dependency on "grid" power, even if the wind turbine is only used for lighting or recharging batteries. The average backyard engineer can construct a w