Based on the provided story and the scoring criteria for Tragedy Degree and Comedy Degree, the evaluation is as follows:

**Tragedy Degree**:
- The story contains elements of environmental degradation and the urgency of climate change impacts, which are moderated by some setbacks and distressing observations. However, it is not profoundly tragic as it ultimately leads to a positive outcome.
- This situates the story in the moderate tragic plots category.

**Comedy Degree**:
- The story concludes on a positive note with the successful preservation of the valley, symbolizing hope and triumph. It has elements of resolution and victory rather than extensive comedic elements or an overly happy ending.
- Thus, it situates the story in a relatively light-hearted category with some positive emotional resonance.

Here is the JSON format for the evaluation:

```json
{
  "TragedyDegree": 5,
  "ComedyDegree": 6
}
```

The scoring reflects a narrative with moderate tragic elements and a slightly more prominent positive, hopeful resolution.
