Definition of fall due:
		
              °The event of small 
airborne particles falling to the ground in significant quantities as a result of major industrial activity, volcano eruption, sandstorm, 
nuclear explosion, etc.
            
 
            
            
          
            
              °The particles themselves.
            
	 
 
		
		
		Definition of fall due:
		
              °The event of small 
airborne particles falling to the ground in significant quantities as a result of major industrial activity, volcano eruption, sandstorm, 
nuclear explosion, etc.
            
 
            
            
          
            
              °The particles themselves.