Editing Polux tree

{{Biotech}}{{stub|reason=Artificial building mechanics, analysis}}{{infobox main|plant|
| name = Polux tree
| image = PoluxTreeB.png
| description = After generations of exposure, these trees have evolved to metabolize pollutants. By drawing pollutants from the ground through wide root networks, they slowly clean polluted terrain in their vicinity. However, they cannot do this if buildings are constructed over their roots.<br>Unlike most methods of cleaning polluted terrain, polux trees do not create toxic wastepacks.
| type = Plant
| type2 = Wild
| hp = 300
| flammability = 1
| beauty outdoors = 6
| grow days = 10
| sow work = 400
| product = wood
| yield = 30
| harvest work = 1000
| min fertility = 0.05
| fertility sensitivity = 0
| min grow light = 0
}}
The '''Polux tree''' is a tree added by the Biotech DLC. It grows within [[polluted]] environments and is capable of absorbing pollution in an area similar to a [[pollution pump]] (7 tile wide circle). Unlike pollution pumps, polux trees do not generate any [[toxic wastepack]]s after absorbing the surrounding pollution. This makes them a safer way to remove pollution. 

== Growing ==
Like the [[gauranlen tree]]{{IdeologyIcon}}, the polux tree does not naturally occur in any ecology. It naturally appears on maps with [[pollution]], and can be spawned by the "polux tree" [[event]],

Every 15 days, the current pollution level and current tree population are checked. If the current amount of trees are below the assigned value, a tree may be spawned.{{Check Tag|Chance?|% Chance, if applicable.}} These numbers also determine the amount of starting trees in your colony.
* No pollution (0-25%): 0 polux trees
* Light pollution (25%-50%): 0 polux trees
* Moderate pollution (50%-75%): 1 polux tree
* Extreme pollution = (75%-100%): 3 polux trees

Polux trees never spawn within 16 tiles of each other.

[[Polux seed]]s can also be bought from [[trader]]s or obtained from [[quest]] rewards.{{Check Tag|Other ways?}}

== Summary ==
* Cleans 1 tile of [[pollution]] every {{ticks/gametime|25000}}.
* Needs {{Ticks/gametime|150000}} to clean 1 deteriorated [[toxic wastepack]] (6 tiles). 
* Is only 20% as fast as a [[wastepack atomizer]].

Polux trees are considered "super", meaning that pawns with the [[Ideoligion#Trees|Trees: Desired precept]]{{IdeologyIcon}} will receive the "amazing tree" thought after seeing one. Unlike the [[Anima tree|anima]]{{RoyaltyIcon}} and [[gauranlen tree]]s,{{IdeologyIcon}} polux trees will still be eaten by [[thrumbo]]s. All trees can also be eaten by [[alphabeaver]]s. They are immune to [[blight]].

They technically take damage from [[toxic spewer]]s and [[toxic fallout]], but regenerate faster than they take damage

== Analysis ==
{{Stub|section=1|reason = General, also what is there is rough}}
The easiest way to use polux trees is to plant them nearby, and leave toxic wastepacks in a stockpile zone next to the tree. Wastepacks outdoors deteriorate into pollution every 8 days assuming no rain or cold temperatures, creating 6 tiles of pollution.

In 8 days, a polux tree cleans {{#expr: (8*24)/10 round 1}} tiles. Meaning that a single polux tree can have a stockpile of {{#expr: ((8*24)/10)/6 round 1}} stacks of wastepacks deteriorating without being overwhelmed. However, this assumes that no rain ever increases the deteriorating rate of the packs. To avoid this, consider placing the stockpile next to a natural rock face to act as a support for a roof to cover the stockpile.

An other easy (and free) way of using the tree is to dump your pollution in a tile five to seven tiles away from yours, and when high enough in pollution, settle it as second base. This'll give access to 3 free trees and can use transport pods without penalty {{Check Tag|Verify}}. Still a lot should be considered before settling a 2nd base and there's a lot more uses for a second base than just 3 polux trees and other uses should be considered for it.

Due to the tree's relatively low waste-clearing speed and the fact that low amounts of pollution do not have much impact on your colony, there is an argument that [[polux seed]]s are not worth their {{Icon Small|Silver||{{Q|Polux seed|Market Value Base}}}} price tag. As long as the pollution is physically far away, the only negatives of it are wastepack infestations and [[acidic smog]]. Polux trees do not stop infestations, as they occur on wastepack destruction, not pollution in general. Meanwhile, acidic smog can be mitigated almost entirely by using [[sun lamp]] greenhouses and non-solar energy. Even then, at only 10% or so pollution (200 wastepacks), smog is a rare event. that being said, in very long runs, a tree can absorb up to a considerable amount of waste. For example a single polux tree can absorb 245 [[wastepack]] in roughly 10 years which is equivalent to a single cooler's capacity in hot [[biomes]], it is a lot when considering that a [[cooler]] takes a 9*9 area and 200W of constant [[power]] while tree's only cost is buying and setting it up and it can clean even more [[pollution]]. 

A polux tree can clean a bit more than 1 [[toxifier generator]]'s worth of waste, allowing for a form of clean energy. The tree cannot be placed near the generator, making you use a [[pollution pump]] and have colonists haul it to the tree. Although given how pollution doesn't spread under natural rock, it is possible to get around this by having the generator inside a 2*2 hole in the mountain with two sides open (one for wires, one for pollution) and a tree nearly overlap the generator to clean additional [[pollution]] also to get rid of artificial building limitation it can be placed in farmlands (and remove [[growing zone]] from under tree. Still, clean energy should be compared to 1. leaving wastepacks far from your colony and buying the polux seeds later, or 2. [[cooler|freezing]] the wastepacks. If you have no better use for silver, then you might as well buy the trees.

== Gallery ==
<gallery>
File:PoluxTreeA.png| Polux tree variant A
File:PoluxTreeB.png| Polux tree variant B
File:PoluxTreeC.png| Polux tree variant C
File:Stump chopped polux a.png|[[Chopped polux stump]] variant A
File:Stump chopped polux b.png|[[Chopped polux stump]] variant B
File:Stump smashed polux a.png|[[Smashed polux stump]] variant A
File:Stump smashed polux b.png|[[Smashed polux stump]] variant B
</gallery>

== Version history ==
* [[Biotech DLC]] Release - Added.
* [[Version/1.4.3555|1.4.3555]] - [[Polux seed]]s introduced, which can be planted on polluted ground.

{{nav|plant|wide}}
[[Category:Plants]]
[[Category:Trees]]
{{Biotech navbox}}