Geothermal power plant near Redruth, Cornwall

[two sheds]

That article says radon should not be discharged at ground level as it's a hazard for children. If you have radon detectors on bookshelves then that would also be the 'safest' place for kids.

a lot of parents in cornwall velcro their kids to the wall for just this reason

 

[Ground Elder]

a lot of parents in cornwall velcro their kids to the wall for just this reason

well, that's one of the reasons...