Wind picks up loose debris and rocks and it can hit other particles. Although one grain of sand would not do much damage. Many grains will. This is the principle of sandblasting, which construction workers use to help clean large area. Wind is more destructive in arid or hot climates. Particles constantly blowing causes very weird desert landforms. Desert pavement is when all the small grains are removed leaving only the larger cobbles. The wind also "shines" the rocks by its constant polishing. Sand dunes are also another landform associated with wind erosion.