A sustainable solar stove
If you like to cook, do a bit of lighting design, clean your drawings of old software CD’s and save the environment in one single thing. Just stick all the old CD’s and stick them on an old satellite dish(why do you need this thing anyway with internet, if you even like to watch television!) According Treehugger is this solar stove capable of 800 degrees F.
You can built your own following the instructions on www.instructables.com