[quote=darkwolf687]
But he's saying you cant cross it or it will kill you. Logically, for this reason you couldn't settle the thing, if it is all surrounded by the grass, as the wind would pick up and kill the settlers.
[/quote]

Alright, I'm sorry. But there IS the grass, and the only danger it'll be is to livestock of any kind- horses, cattle, etc., and it'll cause irritation if its kicked up, or some nasty stomach problems if too much is breathed in. All it does is prevent settlers from moving into valleys, and keeps them from planting ANY crops except in private, closed-off plots where the grass is torn out, as well as the topsoil.

It gives me less of an advantage now; I can't use horses, or livestock. But neither can an invading army.

EDIT: And know that most every settlement is on a large, steep rocky hill, or a small mountain, with the exception of Alacoth, which is on a larger mountain.