They work with any heat source and could be a life savor.
The Bird flue is all too real, when you figure those 120 bunkers blew up around Bahgdad had thousands and thousands of tons of Germ warfare USA, FRANCE and RUSSIAN bombs stored there and Bush ordered Depleted uranium bombs too boot to seal the doom of that nation for millions of years, the fall out has circled the earth and the bird is really Beubonic plague and Anthrax, every morgue in the world test for it, not something called bird flue. This same germ warfare is set to be released world wide as a holy war of all wars and it is nicknamed bird flue.