That statement is not entirely accurate. While radon is a naturally occurring radioactive gas found in rocks and soil, it's not present in all kinds of rocks everywhere.

Here's why:

* Radon concentration varies significantly: The amount of radon present in rocks depends on the type of rock, its uranium content, and the surrounding geological conditions.

* Some rocks have higher radon levels: Certain types of rocks, like granite, shale, and phosphate rocks, tend to have higher concentrations of uranium, which decays to form radon.

* Not all locations are affected: While radon can be found almost anywhere, the levels can vary greatly depending on location. Areas with high concentrations of uranium-rich rocks are more likely to have higher radon levels.

Therefore, it's more accurate to say that radon is found in some types of rocks in certain locations, rather than saying it's found in all kinds of rocks everywhere.