Silicon is the mostly used semiconductor material which used in integrated circuits,because it have some unique properties which make it so useful in electronics industries.
Silicon also can use as insulator as well as conductor .It is generally found in earth crust.
Gallium arsenide and germanium are material which have less used in integrated circuit.
You can recycle it! Tire recycling is the most practical and environment-friendly way of disposing of old and worn-out tires. Due to their inherent durability, large volume and environment and health risks, tires are one of the most problematic sources of solid wastes.