I'd like to weigh in on the burning plastic. There's a tremendous amount of energy encased in plastic (18-19,000 BTU per pound). The problem in a rocket stove, as I see it, is not nearly enough air. It would have to be force fed. Pennsylvania State U. has designed and the Koreans have built a safe plastic heater. It's worth checking out.
#2 and #4 plastics are basically oil. One of these days we are gonna be mining our landfills.
