for creating inks (Williams, 1999). Refer to Appendix H for information on the
chemicals produced by tyre pyrolysis.
There may be many obstacles preventing the use of pyrolysis presently, but
the option must be kept in mind as technologies are constantly improving and the
world’s oil supply is constantly being depleted.
Using these techniques it is possible to substantially reduce tyre waste in Hong
Kong. However, these are neither all encompassing nor the final solution. Tyre waste
in Hong Kong will likely require a combination of these as well as other techniques.
2.3 Government Regulations
One of the key factors in determining the management of tyre waste is
legislation. If proper legislation is enacted, tyre waste can be recycled in an
environmentally friendly manner, while overzealous legislation may lead to illegal
In the United States there is no federal legislation governing the disposal of
waste tyres. The legislation is instead left to the discretion of the individual states
(EPA, 2006). As a result there are differences among states and their laws on tyre
disposal, although there is legislation shared amongst most of the states. As of 2004,
thirty-seven states have banned burying whole tyres due to problems such as creeping
(tyres slowly rising to the surface of the landfill), and nine have gone so far as to ban
tyre shreds from the landfills. Thirty-five states also have collection fees, while five
don’t allow fees due to illegal dumping. Twenty-one states have also created
dedicated scrap tyre funds, and nineteen have created market development incentives
for recycling (Rubber Manufacture's Association, 2004).