Tree

Tree

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Absorbs pollution. Can be chopped down for wood.
Map color
Health	50
Mining time	0.5 (dead tree) 0.55 (tree)
Required technologies
None required

Trees are plants in Factorio. They can be mined for wood, and are the only source of it. Trees are obstacles to construction and must be cleared to provide building space, but they also reduce pollution, so take care not to remove more than necessary. Currently, trees cannot be replanted.

Achievements

Run Forrest, run Destroy 100 trees by impact.

Pyromaniac Destroy 10k trees with fire.

Good methods to remove trees

• Mining by hand (*)
• Shooting swaths of trees with a shotgun or combat shotgun
• Using grenades to blow them up
• Using poison to kill them
• Having construction robots harvest them using a deconstruction planner (*)
• Knocking them down by driving a tank over them
• Burning them with a flamethrower, causing a forest fire
• Burning them with a flamethrower while in a tank
• Using atomic bombs to blow them up

(*) Usable to collect wood. Dead trees will give 2 wood and have a mining time of 0.5. Live trees will give 4 wood and have a mining time of 0.55. All other methods just destroy the tree and wood.

Fires

A forest fire spreads rapidly after a few moments.

Trees can be set on fire by flamethrowers and flamethrower turrets. The fire will spread from tree to tree, releasing high amounts of pollution and leaving stumps and charred trees behind.

Once on fire, trees cannot be extinguished, but the spread of the fire can be limited by creating a fire break.

Pollution removal

Every single tree absorbs a small amount of pollution in its chunk per second. If the total pollution in a chunk is above 60 units, once per second some of the trees in that chunk each have a chance to either lose one stage of leaves or have their leaves become one stage more gray. Regardless of whether the tree loses leaves or gets grayer, 10 pollution are absorbed by the tree.
A tree stops losing leaves/becoming more gray once the sum of its gray percentage and its leaves lost percentage is above 120%. As the grayness and leave stage are then locked for that tree forever, it is possible for trees to keep some leaves in heavily polluted chunks but in turn be very gray, or the other way around.
The less dense the leaves, the slower the tree absorbs pollution, however tree grayness does not affect pollution absorption.

Object	Stage	Pollution per second
Tree, red tree, brown tree	0 (Max leaf density)	-0.001
	1	-0.00067
	2	-0.00033
	3 (Min leaf density)	0
Dead dry hairy tree	No stages	-0.0001
Dead gray trunk	No stages	-0.0001
Dead tree - desert	No stages	-0.0001
Dry hairy tree	No stages	-0.0001
Dry tree	No stages	-0.0001

See also

• Wood
• Pollution