Rock-filled dam uses crushed rocks from Putrajaya Core Island to construct the dam. Using this innovative design, the first rock-filled dam was reduced to one-third of its original size (if it were an earth-filled dam), thus resulting in lower cost and extra land for development, and apart from the dam, the rocks from blasted hills were used to construct rubble walls while the smaller aggregates were used to pave the roads.
Biomass is the term given to the vegetation gathered during the land clearance in Putrajaya land. Putrajaya biomass composting focuses on oil palm wastes, with its biomass composting facility, it aims to achieve zero burning. Oil palm tree trunks and fronds from land clearance were shredded and composted, and the compost used as mulching materials for landscaping at the wetlands.
Water treated from the Putrajaya sewage treatment plants can be used for the purpose of irrigation as the water is treated to Standard A (based on Sewerage & Industrial Effluent Regulations).