The world is constantly seeking new methods to care about the way we consume energy. Dozens and maybe hundreds of innovative solutions of harnessing energy from the surrounding environment have been put forward to the public by inventors and business people alike. This time, you have the opportunity to change things around you and build your very own solar collector from recycled soda pop cans. The trick in all this to work is to paint the empty cans in black and use polycarbonate or double-glazed glass panels in the design. With a project like this you can have almost free heat for a garage…

How to Build a Pop Can Solar Collector – Instructions on Hemmings Daily