Environmental

The EPA action level for radon in indoor air is:

A2 pCi/L
B4 pCi/L✓ Correct
C8 pCi/L
D10 pCi/L

Explanation

The EPA recommends action (mitigation) when radon levels in a home reach or exceed 4 picocuries per liter (pCi/L) of air.

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