| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | atmosphere | Mars mission scientists | The atmosphere of other planets is of great interest for ongoing and future missions, as it affects conditions for human habitation and scientific research. | 1 |
| 2 | atmosphere | Mars-based cultures | The atmosphere of Mars is largely composed of carbon dioxide, with very thin traces of other gases such as nitrogen and argon. | 1 |
| 3 | earth's atmosphere | Mars Colonization Enthusiasts | Seen as a barrier to overcome for potential human colonization of Mars | 1 |