The City of Sydney has decided not to pursue its plan for a trigeneation power precinct at Green Square at this time but has re-affirmed its commitment to cutting carbon emissions using trigeneration, among other technologies, 

The decision to halt the Green Square project resulted from the reduced carbon price, uncertainty about the future of carbon pricing and state and federal regulatory changes. In particular, the the National Australian Built Environment Rating System now treats all electricity from outside a building as though it came from a distant power station on the grid. This means that buildings no longer get environmental star rating credit for using low-carbon power produced nearby.

The Council will now focus on installing trigeneration systems in its own buildings, starting with a plant to provide electricity, heating and cooling to Sydney Town Hall, Town Hall House and the Queen Victoria Building and will revisit the Green Square project once the regulatory environment changes.