You asked
How do you raise the oxygen level?
Answered counted as answeredTo raise the oxygen level, you must place a greenery tile. This action increases the oxygen level by 1 step and also increases your terraform rating (TR) by 1 step. The greenery tile must be placed next to another of your tiles (if possible) and may generate placement bonuses. This is explicitly stated in source [1] and confirmed in source [2], which specifies that using the "Greenery" standard project for 23 M€ allows you to place a greenery tile, which increases oxygen level 1 step and your TR 1 step. Source [3] also confirms that placing a greenery tile increases the oxygen level (if possible) and your TR, and that greenery tiles must be placed next to another tile you own. Therefore, the answer is: place a greenery tile next to another of your tiles, which increases the oxygen level 1 step and your terraform rating 1 step [1][2][3]. Note: The oxygen level is raised only when a greenery tile is placed next to another of your tiles. If no such placement is possible, the oxygen level is not raised [3]. Final Answer: place a greenery tile next to another of your tiles [1][2][3].
Strategy guides → — community tips, kept separate from rulings
🔧 debug — where this ruling came from
- outcome
- ANSWERED — Answered
- corpus profile
- live
- answerer pin (deploy-frozen, attribution only)
- qwen3:4b-instruct-2507-q4_K_M@0edcdef34593
- timings
- search 204 ms · ask 9949 ms · total 10154 ms
- single-flight (PR-5)
- queued n/a ms · generation 10154 ms
- retrieval refs (raw)
- [{"page": 11, "score": 0.032266, "snippet": "8 plant resources may be turned into a greenery tile, which increases oxygen level 1 step (and therefore also your TR 1 step). Note that the greenery tile must be placed next to another of your tiles (if possible) and may generate placement bonuses (see page 5). Example: Robinson removes 8 plant res", "headingPath": "F) Convert plants into greenery", "sharpsignalDocId": 59}, {"page": 14, "score": 0.031319, "snippet": "Terraforming Mars is about making Mars earthlike enough to live freely on it. There are 4 parameters on the game board connected to this process: Terraform rating, temperature, oxygen level and ocean coverage. Terraform Rating (TR) is the measure of how much you have contributed to the terraforming ", "headingPath": "Parameters", "sharpsignalDocId": 59}, {"page": 9, "score": 0.030303, "snippet": "In order to play a card you must meet its requirements and be able to perform the effects stated on the card, with the following exceptions: You may play a card that... raises global parameters that have already reached their goal (for example when there are no more ocean tiles, or when the temperat", "headingPath": "1) Check the requirements.", "sharpsignalDocId": 59}, {"page": 5, "score": 0.030018, "snippet": "The game board has a map where tiles may be placed. When placing a tile, you must first check to see if there are any placement restrictions. There are areas reserved for ocean and specific cities, where no other tiles may be placed. Furthermore, each tile may have specific restrictions printed on t", "headingPath": "TI L E S", "sharpsignalDocId": 59}, {"page": 13, "score": 0.029139, "snippet": "All rules apply as usual for solo play, with these exceptions: 1) Before you choose your cards, place 2 neutral city tiles on the map with an adjacent greenery tile each (these tiles are not yours, and do not increase the oxygen level): reveal and discard the 4 top cards of the deck and use their co", "headingPath": "Solo variant for Corporate Era:", "sharpsignalDocId": 59}, {"page": 3, "score": 0.028543, "snippet": "In Terraforming Mars, you control a corporation, and you buy and play cards describing different projects. The projects often directly or indirectly contribute to the terraforming process, but can also consist of business enterprises of different kinds. In order to win, you have to accumulate a good", "headingPath": "GAME OVERVIEW", "sharpsignalDocId": 59}, {"page": 4, "score": 0.016129, "snippet": "As the atmosphere thickens, greenhouse effects will raise the temperature, as indicated by the bonus at 8% oxygen. As the temperature rises, carbon dioxide will thaw out, adding a greenhouse warming effect as indicated by the heat production bonuses. Then, at 0 ˚C, ice-bound water in the soil will b", "headingPath": "The Bonus Steps", "sharpsignalDocId": 59}, {"page": 3, "score": 0.015873, "snippet": "Temperature, oxygen, and ocean are called global parameters . Whenever you raise one of them, your terraform rating also increases by that much, giving you a higher income and score. When a global parameter has reached its goal, it can't be raised any further, and so does not increase your TR. You m", "headingPath": "GLOBAL PARAMETERS", "sharpsignalDocId": 59}]
- citations (raw)
- [{"page": 11, "quote": null, "headingPath": "F) Convert plants into greenery", "sharpsignalDocId": 59}, {"page": 10, "quote": null, "headingPath": "B) Use a standard project", "sharpsignalDocId": 59}, {"page": 5, "quote": null, "headingPath": "TI L E S", "sharpsignalDocId": 59}]
- boost provenance — errata + base rulebook (E2/E3)
- gate not evaluated for this ruling (boost, supersedence, and wrench all off at ask time), and the base-rulebook arm went unrecorded for the same reason — the wrench that would have stored it was off; rulesage.errata.boost-enabled=false, rulesage.errata.supersedence-enabled=false
- answered-before recall
-
this ruling was answered, so past rulings were not offered
similarity threshold in force: 0.55 (rulesage.answered-before.similarity-threshold; the exact-question tier is not gated by it)
- debug row retained until
- Oct 6, 2026 23:59
retrieval — what the search arm returned
score = the fused retrieval score (reciprocal-rank fusion over the search arms) — NOT a cosine similarity. How many arms fused this ruling was NOT RECORDED (it predates the boost trail, ran on the path that stored none, or stored one that could not be read), and the ceiling depends on that count (ceiling = arms/(k+1) at k=60): 2 arms top out at 0.03279; 3 arms top out at 0.04918. So a score above 0.03279 here is not an anomaly: it is arithmetic proof a boost arm voted, and the measured band 0.016–0.033 (taken on two-arm asks) is what does not apply. A chunk only one arm ranked highly lands near 0.016 (that one arm's #1 vote), so 0.03 here is an excellent hit, not a 3% match.
per-arm ranks (the rank each search arm gave a chunk): NOT DISCLOSED by the gateway. Fusion happens gateway-side and only the FUSED score crosses the wire, so rulesage cannot show them without a gateway change. The rank column below is the FUSED rank (position in the returned list), which is real.
token count per chunk: NOT DISCLOSED — chunk token counts are not reported on the ask path. The character counts below are of the bounded snippet/quote rulesage actually received — a real measurement of what we hold, never an estimate of the chunk.
| fused rank | document | heading | page | fused RRF score | snippet chars |
|---|---|---|---|---|---|
| #1 | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | F) Convert plants into greenery | p.11 | 0.032266 (inside the measured healthy band 0.016–0.033 (measured on two-arm asks; this ruling's arm count was never recorded)) | 300 |
| #2 | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | Parameters | p.14 | 0.031319 (inside the measured healthy band 0.016–0.033 (measured on two-arm asks; this ruling's arm count was never recorded)) | 300 |
| #3 | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | 1) Check the requirements. | p.9 | 0.030303 (inside the measured healthy band 0.016–0.033 (measured on two-arm asks; this ruling's arm count was never recorded)) | 300 |
| #4 | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | TI L E S | p.5 | 0.030018 (inside the measured healthy band 0.016–0.033 (measured on two-arm asks; this ruling's arm count was never recorded)) | 300 |
| #5 | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | Solo variant for Corporate Era: | p.13 | 0.029139 (inside the measured healthy band 0.016–0.033 (measured on two-arm asks; this ruling's arm count was never recorded)) | 300 |
| #6 | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | GAME OVERVIEW | p.3 | 0.028543 (inside the measured healthy band 0.016–0.033 (measured on two-arm asks; this ruling's arm count was never recorded)) | 300 |
| #7 | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | The Bonus Steps | p.4 | 0.016129 (inside the measured healthy band 0.016–0.033 (measured on two-arm asks; this ruling's arm count was never recorded)) | 300 |
| #8 | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | GLOBAL PARAMETERS | p.3 | 0.015873 (below the measured healthy band (< 0.016) — a weak fuse on a two-arm ask, and this ruling's arm count was never recorded) | 300 |
chosen chunks — what the answer actually cited
token count per chunk: NOT DISCLOSED — chunk token counts are not reported on the ask path. The character counts below are of the bounded snippet/quote rulesage actually received — a real measurement of what we hold, never an estimate of the chunk.
| # | document | heading | page | quote chars |
|---|---|---|---|---|
| [1] | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | F) Convert plants into greenery | p.11 | no quote on the wire |
| [2] | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | B) Use a standard project | p.10 | no quote on the wire |
| [3] | RULEBOOK Terraforming Mars — Rulebook (corpus doc 59) | TI L E S | p.5 | no quote on the wire |
generation — timing and the path taken
- timing split
- retrieval 204 ms · first delta n/a · total 10154 ms (retrieval and first-delta both measured from the START of gateway work, so first-delta INCLUDES retrieval — do not subtract)
- full breakdown
- queued n/a ms · retrieval 204 ms · ask 9949 ms · gateway work 10154 ms · total 10154 ms
- live seat (read from the running child)
- answering — gemma4:26b think:false · num_ctx 32768 (live-verified 34s ago)
- stream path
- not recorded — this ruling predates the stream-path column (V41)
- watchdog
- first-token watchdog: 30s per arming window (rulesage.table.first-token-watchdog-seconds), re-armed once by the passages frame — so the worst case before a reader falls back to polling is 60s. Whether it actually fired is a BROWSER-side decision that never reaches the server, so it is not recorded here. The stream path above is the server's half of that story: whether a delta was emitted at all.
- num_ctx · think posture
- both are the CHILD's settings, not rulesage's, and no ask reply carries them — an answer never states which context window or think posture produced it. The live-seat line above reads them from the running child instead, where the gateway can answer for itself; it describes the child NOW, not this ask.
disposition
- outcome
- ANSWERED — Answered
- abstain rationale (n/a — this ruling answered)
- answered — no abstain rationale applies
setup-shape — why the checklist band did or didn't render
- decision
- NOT_SETUP_SHAPED — no setup-shape pattern matched this question
errata registry — what the gate above had to match against
this game registers NO errata cards (edition 8), so "no registered errata card matched" above could never have matched one
Errata scope: the gate above matched this ruling's own edition only. When an ask also reads an expansion, that expansion's own registered errata cards stay outside the match — a stated phase-1 limitation, not a failed lookup.