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ripTDR · 09-03-2021, 06:11 AM

As far as concrete goes, construction grade sand is starting to become a non renewable resource.

https://www.bbc.com/future/article/2...ng-out-of-sand

just to add more complications

09-03-2021, 06:11 AM	#740
ripTDR Crash and Bang Winger Join Date: Apr 2012 Exp:	As far as concrete goes, construction grade sand is starting to become a non renewable resource. https://www.bbc.com/future/article/2...ng-out-of-sand just to add more complications