Recycled and waste thermoplastics are some of the major components
of global municipal solid waste (MSW) and they present a
promising raw material source for WPCs, especially because of the
large volume and low cost of these materials. Table 1 shows that
waste plastics account for 11.2% of the annual 84.2 thousands tons
of the municipal waste stream generated in Tehran during 2006
(Ashori, 2008) and 12.4% of 250 million tons in the USA during