> I take issue to the generalization that short half lives = more danger. That is just not true. On this I have to concede that it's not strictly true because

> I take issue to the generalization that short half lives = more danger. That is just not true. On this I have to concede that it's not strictly true because some decay events produce more/ more dangerous radiation than others, and much more importantly, the decay of some isotopes start a long decay chain where all the successor isotopes decay much faster than the original. However, both of those effects are relatively small constant multipliers next to the 9 order of magnitude difference between decay rate of an isotope with a half-life of 16 million years compared to an isotope with a half-life of 8 days.