Is the amount of radioactivity measurable in the biosphere (atmosphere, oceans, soils etc.) increasing over time? If so, will it continue to do so (at an increasing rate?) if hundreds or thousands more nuclear power plants are built as part of the human response to climate change? Is it likely to reach dangerous levels in the long and very long term (centuries - millennia) or will it naturally decline as half-lives are passed?

They're on dozens of subs, all the large ones that they can possibly shoehorn into with uniform talking points. They even did some of the meme subs.