Depends on how you value the environment or human rights... https://www.wired.com/2015/03/illegal-sand-mining/ https://www.wired.com/2015/03/illegal-sand-mining

Depends on how you value the environment or human rights... https://www.wired.com/2015/03/illegal-sand-mining/ https://www.wired.com/2015/03/illegal-sand-mining/ https://en.wikipedia.org/wiki/Environmental_impact_of_concrete https://en.wikipedia.org/wiki/Environmental_impact_of_concre...