How sand mining is eroding rivers, livelihoods and cultures
Sand underpins everything from skyscrapers to smartphones. Sharp sand (as opposed to rounded desert sand) is the key ...
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Paint can be stripped in seconds using "dustless blasting"
It uses a mixture of water and an abrasive such as recycled glass, silica sand, or coal slag. The mixture gets blasted between 60-150 psi. It cuts through paint, primer, and vinyl. The water ...