Activity for ECP
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
If there are water oceans, must there be oxygen in the atmosphere? I am trying to create a planet that either has no oxygen in the air, or it has very little; i.e. not enough to sustain humans without the use of a breathing apparatus. Large portions of the planet (approximately 50-60% of the surface, compared to Earth's 70%) are covered with oceans, seas, lakes, and... (more) |
— | over 6 years ago |