Metal would be your answer as it's a permeable substance.
hope it helps!
Well, Ecuador is a country filled with rainforests, which occur where it rains a lot, the western side of mountain ranges, where storms build up and stall, and it could be during el nino, which means a large abnormal amount of storms in pacific tropical areas.
Between 1931 and 1940 a ton of soil blew out of the central and southern great. It was a period of severe dust storms that greatly damaged the ecology and agriculture during the 1930s.
The Same reason the ancient egyptians lived on the banks of the flooding nile. The flood waters push up very fertile soil that is great for growing crops.
