Naturally occurring gases like radon and water vapor are present in the earth beneath a house; they migrate through the foundation and accumulate inside the house.

Name: Naturally occurring gases like radon and water vapor are present in the earth beneath a house; they migrate through the foundation and accumulate inside the house.
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Question

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This statement is true. Gases such as radon and water vapor can migrate through a house's foundation and accumulate inside.

Naturally Occurring Gases Like Radon and Water Vapor Are Present