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(TROPICAL, TEMPERATE, SUBTROPICAL, MINING, ASTRONOMY, WATER, FIRE,…

- - - - BROADLEAF
      - CONIFEROUS
      - maize
  - - - BROADLEAF
        
        rubber tree
        
        rubber
        
        ballgames
      - maize
      - bamboo
  - - - peas
  - - - maize
      - cotton
      - coffee
      - rice > rice wine
      - cattle
        
        milk > cheese
        
        leather
  - - - reeds > reed pen
      - papyrus
  - - - cotton
      - glass > glass blowing
- - - - grapes > grape wine
      - asia
        
        silk moth > silk
    - - wheat
      - rye
  - - - grasslands
        
        mountain
        
        hemp
        
        paper
        
        horses > durable leather
  - - - CONIFEROUS
  - - - oats
  - - - CONIFEROUS
      - BROADLEAF & MIXED
        
        goats
        
        leather
        
        milk > cheese
  - - - reeds > reed pen
  - - - glass > glass blowing
- - - - tea
      - cotton
      - barley
    - - bronze
  - - - cotton
      - barley
      - glass > glass blowing
    - - wool
      - leather
  - - - pigs > leather
  - - - BROADLEAF
      - CONIFEROUS
      - pigs > leather
  - - - reeds > reed pen
- - - - bronze
    - - steel
- - - - asphalt
        
        concrete
- - - - bees > honey > mead