Ben Gurion University scientists studying naturally occurring ionizing radiation in the US, discovered that, contrary to expectations, higher levels of radiation lead to lower levels of many solid cancers. Levels of other cancers were not influenced by background radiation levels.

https://in.bgu.ac.il/en/pages/news/background-radiation.aspx

https://link.springer.com/article/10.1007/s10522-020-09909-4