@bob There are more advanced nuclear options available than the standard reactors we see so many of, but they're the cheapest and people want to look like they're being "clean" without the costs associated with doing them properly.  Thorium is far better than uranium for example, but even that tech is relatively old (late 50s), and the proposed advancement of molten thorium salt reactors has been tied up in red tape here in Canada at least for literally half a century - no one wants to fund it.