This is interesting, I didn’t know that desert countries were actually importing sand for construction! Here’s a relatively recent paper looking at the suitabil

This is interesting, I didn’t know that desert countries were actually importing sand for construction! Here’s a relatively recent paper looking at the suitability of desert sand to replace the fine aggregate in cement: https://www.sciencedirect.com/science/article/abs/pii/S0950061806001917 https://www.sciencedirect.com/science/article/abs/pii/S09500..., concludes that it can be used in small percentages. Idea: It would be useful to have global competitions with hefty prizes, e.g > $1M, for process inventions that address scarcity problems like this to spur independent young researchers.