In 2100, desertification becomes extremely serious in Wellington. As desertification intensifies, most lands are being abused and unhabitable. There will be no water for irrigation.The phantom city concept is based on the Physarum form finding system that using self-grow materials as structure and recycling metals from the landfill as exterior facade. Sand grains plus a Bacillus pasteurii bacterial will create a natural cement to construct the structure. When the sand grains and bacteria are mixed, the bacteria starts filling up the voids in between the sand grains and produces calcite that binds the
grains together strongly.