Because they are not bio-degradable
Tires are recyclable. If put in a landfill they will take thousands of years to disintegrate and will pollute the ground water.
Landfills normally don't allow you to dispose of tires due to the large volume of space they take up. It's easier to drop off or recycle them for other uses and have someone else shred them. Landfills allow shredded tires because they take up less space.
Tires, electronics, and dead animals
Snow tires are still legal only during certain times of the year. They are legal from Oct 15th-April15th only. The reason they are banned in the summer is because they do damage to the roads and the Asphalts in the summer.
One result of ozone pollution in an urban environment is shortening the life of automobile tires. Tires that are not recycled land into the landfills and if tires are caught on fire, they will produce toxic gases into the air that could burn for more than a year.
It is not the tires that are bad for the environment, it is the storage and disposal of them that is a problem. The fumes that are created are toxic, and harmful for the environment. Many landfills no longer accept them, since they do not decompose very rapidly and take up space.
lead is a toxic heavy metal. disposal of electronics in landfills could cause leaching of any lead they might contain into the landfill.
560,000 acres are active landfills. I have no idea about old landfills
When landfills fill up, people open up new landfills.
the landfills are overflowing
there are 90 landfills in new zealand
There is a growing amount of landfills in the United States.