Smartest $19.95 you may ever invest
This book teaches you:
Where to get free solar panels, where to get free glass (enough to greenhouse every roof on your block, bourrough, city..), how2 build your DIY free solar ovens, how2 make: free fresnel lenses, free solar hot water, passive solar water desalination(!), the 25 cent solar window heaters, home cooling, ice making, and many many more...
step-by-step and doable --most are at the level of "a 6 year old can do it in 30 minutes."
so what are you waiting for??
go buy the book!!