| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | fossil fuels | Geologist community | Fossil fuels are a non-renewable energy source formed from the remains of ancient organisms and are a major focus of study and concern for geologists. | 1 |
| 2 | fossil fuels | Geologist community | Geologists study the formation, extraction, and impact of fossil fuels on the Earth's geology. | 1 |