What is North Korea's main source of income?

Related questions

1. Who can travel to North Korea?
2. Is it legal to visit North Korea?
3. How long is the drive from Seoul to DMZ?
4. What is JSA Korea?
5. Can you take pictures in North Korea?
6. How common is English in South Korea?
7. How far apart are Japan and Korea?
8. How many hours is Korea from China?
9. Can I visit North Korea from South Korea?
10. How does the Korean DMZ work?

Tags

1. #equipment
2. #machinery
3. #total
4. #metallurgical
5. #agricultural
6. #manufactured
7. #imports
8. #china
9. #cooking
10. #grain
11. #products
12. #fishery
13. #items
14. #region
15. #textiles
16. #north
17. #import
18. #petroleum
19. #exports
20. #korea
21. #minerals