<P> As human overcrowding of developed areas intensified during the 20th century, it has become important to develop land re-use strategies for completed landfills . Some of the most common usages are for parks, golf courses and other sports fields . Increasingly, however, office buildings and industrial uses are made on a completed landfill . In these latter uses, methane capture is customarily carried out to minimize explosive hazard within the building . </P> <P> An example of a Class A office building constructed over a landfill is the Dakin Building at Sierra Point, Brisbane, California . The underlying fill was deposited from 1965 to 1985, mostly consisting of construction debris from San Francisco and some municipal wastes . Aerial photographs prior to 1965 show this area to be tidelands of the San Francisco Bay . A clay cap was constructed over the debris prior to building approval . </P> <P> A notable example is Sydney Olympic Park, the primary venue for the 2000 Summer Olympic Games, which was built atop an industrial wasteland that included landfills . </P> <P> Another strategy for landfill is the incineration of landfill trash at high temperature via the plasma - arc gasification process, which is currently used at two facilities in Japan, and will be used at a planned facility in St. Lucie County, Florida . </P>

Describe land reclamation and other projects in bombay