Recycling is a specific branch of technology related to the reuse and renewal of materials for the greater good of the environment and higher efficiency of worlds. It consists of several technologies, special projects and zone upgrades.

(Rectangles are techs, octagons are planetary projects, hexagons are zone upgrades. Arrows are prerequisites, dashed arrows are project dependencies.)

• Advanced Multi-Field Research Cooperation - Base technology to enable access to all other technologies
  • Large Scale Recycling Processes - Core technology of all recycling. Enables Planet-Wide Waste Handling Infrastructure
    • Planet-Wide Waste Handling Infrastructure - Core special project required on all planets with recycling upgrades
      • Waste Material Post-processing Plant - Special Project but actually a zone upgrade to decrease power usage of a zone.
      • Racial Recycling Infrastructure Affinity - Second Tier technology related to population
        • Harmonized Industrial Recycling Awareness - Special Project to upgrade population material boost. Additionally Requires Planet-Wide Waste Handling Infrastructure
      • Specialised Industrial Recycling Analysis - Second Tier technology related to other upgrades
        • Industrial Recycling Facilities - Special Project but actually a zone upgrade to increase industrial zone production. Additionally requires Planet-Wide Waste Handling Infrastructure
        • Raw Material Refining Facilities - Special Project but actually a zone upgrade to increase raw material zone production if planet has Focus. Additionally requires Planet-Wide Waste Handling Infrastructure