Landfill
Until a few years ago the most common way to dispose of waste tyres was to dump them in landfills.
This is however not very desirable neither for environmental nor economic reasons.
First of all the ELTs decompose very slowly in nature, secondly they pose a fire risk as well as a health risk (e.g. potential malaria threat due to mosquito nesting). Thirdly they take up a lot of space, which is uneconomical.
In addition, landfilling leads to the loss of a resource that could have been used much more productively.