Why won't
they do it?
3rd grade
A nationwide survey of radon levels in schools estimates that nearly one in five has at least one schoolroom with a short-term radon level above the action level of 4 pCi/L (picoCuries per liter) - the level at which EPA recommends that schools take action to reduce harmful exposure.
Background is an actual radon chamber
https://joom.ag/OfmL/p10
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