I love stories like this. Scientists using their skills to come up with inexpensive solutions to global problems. Dude invented a $5 solar-powered cardboard stove. It will keep people from having to cut down trees. I hope they get them to Darfur right away, as I understand it women are being raped there when they go to gather firewood. It will also save lives because it makes it easier to boil drinking water. I wonder if there are any commercial applications. I can definitely see people using them when they go camping and such. Just think, using our skills to save lives instead of killing people. It doesn’t get any better than this.