They’re full of oyster shells, leftovers collected from the plates of patrons at more than 45 New York restaurants. Every week, a truck drops the shells at a Greenpoint processing site.

Workmen uncover oyster shell wall in 17th Century Edinburgh shop. By Alison Campsie. Published 20th Dec 2020, 07:00 BST. Gladstone's Land painted in 1855 by Henry Gibson Duguid (1805 - 1860).