> a place that can't sustain themselves naturally Many places where this technique is used were once more lush but humans degraded the environment, often thro

> a place that can't sustain themselves naturally Many places where this technique is used were once more lush but humans degraded the environment, often through overgrazing. So, the degraded landscape of today may not be the "natural" state. Take China's efforts to restore the Loess Plateau, probably the largest restoration effort ever undertaken. https://en.m.wikipedia.org/wiki/Loess_Plateau https://en.m.wikipedia.org/wiki/Loess_Plateau I've not heard of concerns you raised about the impact on deltas. I'm not a scholar but I've done some research on the issue. Can you point me to any papers that address your concerns?