Which of the following is a source of radon?

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Multiple Choice

Which of the following is a source of radon?

Explanation:
Radon is produced by the natural decay of uranium found in bedrock and soil, and as a gas it moves through soil pores and cracks to enter buildings from the ground. That makes bedrock or soil the primary source of indoor radon. While radon can be present in water supplies, paint, or insulation, these are not the main sources of radon gas entering homes. The soil beneath a building sets the stage for how much radon can seep in, which is why geology and foundation conditions are key factors in radon risk and mitigation.

Radon is produced by the natural decay of uranium found in bedrock and soil, and as a gas it moves through soil pores and cracks to enter buildings from the ground. That makes bedrock or soil the primary source of indoor radon. While radon can be present in water supplies, paint, or insulation, these are not the main sources of radon gas entering homes. The soil beneath a building sets the stage for how much radon can seep in, which is why geology and foundation conditions are key factors in radon risk and mitigation.

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