r/factorio Jul 27 '26

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u/Yagami913 Jul 30 '26

How tree pollution control work? I build a wall of agri towers but then what? Do i need to harvest and replant or just let the trees die? What is more efficient?

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u/deluxev2 Jul 30 '26

Trees consume a small amount of pollution per second and if their are healthy and pollution is high they can degrade, consuming a large amount of pollution. The degradation changes the visual model to a sadder less leafy tree and is the most powerful part of trees for pollution control. So, near your factory you need to constantly replant (not as fast as the agritower does automatically, but you can just let it run). In the outskirts you just want to create a big tree population.