In Vivid Worlds Will Kill You, @Traipse proposes that 🌱 Challenging environments should answer three questions out of the following six:
- Why is resting is difficult?
- Why is finding food difficult?
- Why is travel difficult?
- Why is not getting lost difficult?
- Why is fighting difficult?
- Why transporting cumbersome goods or treasure is difficult?
(They actually propose answering "two to three", but that's an awkward title for a note.)
To answer these, you can use 🌱 Biotic & abiotic factors for challenging environments.