Dust and the American west

A Images of deserts in the United States show dusty, barren landscapes, but the land may not always have been this way. Ever since settlers moved west across the US there has been dust-clouds of it everywhere. It was part of the landscape, or so it seemed to them. But there were no records of the landscape of the West until the settlers arrived. Now evidence is starting to emerge which suggests that before the settlers, there was very little dust. B The evidence comes from the San...