The Sahara Desert in Africa has a lot of dust storms. Most Sahara dust is product of sand. Dust storms within the Sahara Desert can blow a wall of dust as substantial as a person mile off the ground. Dust storms might make it very hard to see and breathe. https://dustseal4427102-0129629.blogsmine.com/36701382/not-known-details-about-main-shaft-sleeve-442-7117-01