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dustdevil · June 25, 2016

In rocky areas of Ireland, seaweed was used to make the first soil.

The Potomac was once a highly polluted river. How effective was the cleanup?

June 25, 2016	#31
dustdevil Tomatovillian™ Join Date: Jan 2010 Location: WI, USA Zone4 Posts: 1,887	In rocky areas of Ireland, seaweed was used to make the first soil. The Potomac was once a highly polluted river. How effective was the cleanup?