 into the millions of years. Some of the radioactive elements in both low and high-level waste have a half-life of into the millions of years, and you multiply that by 10 or 20 half-lives, and you get hundreds of millions of years dangers from this fuel. Some of the radionuclides are short or lasting, only maybe 300 years. But still, we've never really isolated waste for as long as it's hazardous,