Answer
Finland
Explanation
Finland has built the world's first nuclear waste repository named 'Onkalo'.
Key Points
- > Known as Onkalo
- > Constructed deep underground
- > Long-term security
Additional Information
- It will keep the waste safe for 100,000 years.
- It is built in granite rock.
| Subject | Information |
|---|---|
| Project Name | Onkalo |
| Depth | 400-450 meters |