Having followed a few threads due to Fukushima, and having read a lot of media reports, pdfs beyond number, scoured the Wikipedia pages for days, even cracked a book or two, I just realized I don't know the answer to a simple question. I was looking for a thread to ask it in, then realized that was selfish and short sited. Much like this opening paragraph is becoming. There may be more questions, other people may want to chime in, the whole thing could very well start a chain reaction. But enough of that. The query is this: Why and how do hydrogen bombs create radioactive cesium, iodine, and other dangerous fallout particles? For example I've read from multiple sources that the world is already lightly dusted with all the isotopes that come from a leaking reactor, or burning fuel pond. But why would a bomb that contains just plutonium create all the same radionuclides? http://alethonews.wordpress.com/201...sed-by-bomb-test-fallout-15000-of-them-fatal/ And why so much of them? I thought a small part of the plutonium was turned into energy, thus the boom. Why and how and where did all the dangerous fallout come from?