Where does all the rubber go from the tires that is warn off each day on the highways and roads is there a rubber mountain somewhere or does it viperized into the air .... what has happened to the?

The rubber is there, you just can not see it some times. If it is an asphalt road you can not see it very well. The rain and other weather washes most of this away. You can see some rubber trails on roads that are lighter colored. The 3 lines down a road are two tire tracks and a fluid trail.