a) In landfills, old tires are buried and thus contaminate the underground aquifer with heavy metals. A tire takes around 2.000 χρόνια to decompose in the environment.
Since 2006, the legislation does not allow the burial of tires within the European Union.
b) By incineration where the old tires are burned in order to keep the steel intact. However, this is a huge pollution for the environment because CO2 emissions are produced and it is a waste of raw materials.