DIY Portable 12V Air Conditioner - Cheap and easy! This project includes materials list with the places and prices for inexpensive little items such as a bilge pump that make up this unit. It is designed to throw ice in from the freezer (not dry ice), plug into car 12V and cool the car while driving with a broken air conditioner. For longer drives, stop and buy more ice! Designed for a small car.
Build Your Own Vertical-Axis Wind Turbine On The Cheap - Didn't realize vertical wind turbines existed. The scale of this one and the fact that it supposedly doesn't require gale force winds to produce power makes it definitely worth looking into.