| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | radon | United States | Testing for radon in US homes is common due to potential health risks from indoor air quality concerns. | 4 |
| 2 | radon | Japan | Radon awareness and testing are not common in Japanese culture. | 3 |
| 3 | radon | Africa | In Africa, awareness of the health risks associated with radon gas is low. | 1 |
| 4 | radon | European countries | Radon testing in European homes is infrequent and not a significant worry for the majority of people. | 1 |