Is it possible for humans to live on a world with the following conditions?
- 50% nitrogen;
- 30% oxygen;
- 20% carbon dioxide.
- The rain in some areas is acidic. (Is there some factor other than air currents that affects the creation of polluted clouds and its rainfall?)
- Temperatures between -5 ° C and 30 ° C.
- Some more robust plants than Earth survive the acidic waters and produce oxygen, along with some seaweed caves with pure water.