Do you have to kill silkworms to get silk?

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Tags

1. #inside
2. #kilogram
3. #gassed
4. #because
5. #boiled
6. #killed
7. #silkworms
8. #unravelling
9. #cocoons
10. #threads
11. #workers
12. #obtain
13. #begin
14. #insects
15. #industry
16. #their
17. #stage
18. #which
19. #alive
20. #causes