New Atlas: 3D-printed clay tiles designed to restore coral reefs

https://newatlas.com/environment/clay-reef-tiles/?utm_source=New+Atlas+Subscribers&utm_campaign=7c880f9f66-EMAIL_CAMPAIGN_2020_12_04_06_42&utm_medium=email&utm_term=0_65b67362bd-7c880f9f66-91894369