Are cinder blocks bad for gardens?

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Tags

1. #container
2. #chemicals
3. #raised
4. #found
5. #plants
6. #harmful
7. #leach
8. #might
9. #concrete
10. #ultimately
11. #internet
12. #garden
13. #warnings
14. #universities
15. #gardens
16. #cinder
17. #blocks
18. #recommending