There are compounds that can be sprayed on soil that lock it in place against erosion. It has to be redone every so often or if the soil is disturbed. For insta

There are compounds that can be sprayed on soil that lock it in place against erosion. It has to be redone every so often or if the soil is disturbed. For instance this: https://fibramulch.com/products/tackifiers/earthbound-scientific/ https://fibramulch.com/products/tackifiers/earthbound-scient... Probably this has been considered, and it would be quiet expensive.