> Sand is plenty […] Specific sands are needed for specific purposes, and sometimes they can be a challenge logistically. Further, on human time scales, sand i

> Sand is plenty […] Specific sands are needed for specific purposes, and sometimes they can be a challenge logistically. Further, on human time scales, sand is a non-renewable resource: * https://www.bbc.com/future/article/20191108-why-the-world-is-running-out-of-sand https://www.bbc.com/future/article/20191108-why-the-world-is... * https://e360.yale.edu/features/the-hidden-environmental-toll-of-mining-the-worlds-sand https://e360.yale.edu/features/the-hidden-environmental-toll... * https://www.theguardian.com/cities/2017/feb/27/sand-mining-global-environmental-crisis-never-heard https://www.theguardian.com/cities/2017/feb/27/sand-mining-g... * https://www.reuters.com/graphics/GLOBAL-ENVIRONMENT/SAND/ygdpzekyavw/ https://www.reuters.com/graphics/GLOBAL-ENVIRONMENT/SAND/ygd... * https://www.goodreads.com/en/book/show/36950075 https://www.goodreads.com/en/book/show/36950075