Urbanization is one of the evident global changes in the world,
especially during past decades. At the meantime, the environmental
impact caused by municipal solid waste (MSW) has drawn
more and more special social and environmental attention along
with the rapid and constant growth of urban population and the
urban MSW generation. Undoubtedly the disposal of MSW is a
growing social concern nowadays. It also becomes increasing
imperative for the planners or policy makers to find effective and
sustainable ways to collect and dispose the booming amounts of
MSW, especially in these high population density areas, e.g.
Singapore.