| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | hydrocarbon molecule | scientific community | Basic building block of fossil fuels and organic compounds | 1 |
| 2 | methane | scientific community | Methane is a potent greenhouse gas and a significant contributor to climate change. | 1 |
| 3 | methane molecule | scientific community | Methane is a significant greenhouse gas and its emissions are a major environmental concern. | 1 |
| 4 | methane molecule | scientific community | Methane molecule is a significant contributor to greenhouse gas emissions and climate change. | 1 |