| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | carbon monoxide | Western countries | Carbon monoxide is a toxic gas, and there are strict regulations and guidelines to prevent exposure to it especially in households and workplaces. | 1 |
| 2 | carbon monoxide | Western countries | Carbon monoxide detectors are commonly installed in homes for safety. | 1 |
| 3 | carbon monoxide | western countries | Carbon monoxide detectors are commonly installed in homes and buildings to prevent poisoning. | 1 |