In early game,
what player had is burner mechine and wood-required recipes.
by introducting primitive treefarm,player got a tool to balancing pollution without worrying over-expanding factory.

in detail,this tree farm only cost 1 wood and 1 stone, cheap enough to scale up production even in the early game,
but it only generate 1 wood and remove 10 pollution every 10 minute,
make it really in need of scale up.

Known Issue

Primitive Treefarm only has 1 tint(I need help)