Pollution

Global Pollution popup

Pollution is a special late-game mechanic of Humankind. Beginning from the Industrial Era, certain Districts and Infrastructures will produce Pollution on a per turn basis. Pollution will accumulate inside Territories and gradually impact its Districts and the Stability of the contolling City. Each Empire contributes to Global Pollution based on their Pollution production per turn in their Territories. Global Pollution impacts the whole map and reduces Food production and Stability in Cities.

Sources of Pollution

The only way to produce Pollution is through District construction. Each District that pollutes, contributes to the Territory's Local Pollution. Makers Quarters and Farmers Quarters don't produce Pollution on their own, but certain Infrastructures may provide them with polluting properties on top of extra bonuses. Emblematic Districts with the "count as" attribute will get the Pollution effects from Infrastructures based on their District type tag.

Districts

• +5 Pollution per Train Station
• +5 Pollution per Aerodrome
• +15 Pollution per Airport
• +15 Pollution per Missile Silo

Infrastructures

District	Pollution	Infrastructure	Era
On Makers Quarter	+2	Coal Plant	Industrial Era
	+1	Sawmill	Industrial Era
	+1	Factory	Industrial Era
	+1	Anti-Air Surveillance	Contemporary Era
	+2	Financial District	Contemporary Era
	+2	Quarrying Machinery	Contemporary Era
	+2	SAM	Contemporary Era
	+2	Automated Factory	Contemporary Era
	+2	Tech Park	Contemporary Era
	+2	Command Compound	Contemporary Era
On Farmers Quarter	+1	Industrial Silos	Industrial Era
	+2	Factory Farming	Contemporary Era

Pollution Level

Pollution will gradually accumulate every turn.

When the Global Pollution reaches the highest level (over 100k accumulated Global Pollution), it will trigger the Rending the world unfit for human life End Condition, forcing the game to end after the next turn (Standard Speed).

Global Pollution

Pollution Level	Effects	Thresholds
Very Low Pollution	No effects on human life	0-45k accumulated Global Pollution
Low Pollution	On all Districts -2 Stability -25% Food	45k-72k accumulated Global Pollution
High Pollution	On all Districts -5 Stability -50% Food	72k-100k accumulated Global Pollution

Local Pollution

Pollution Level	Effects	Thresholds
Very Low Pollution	No effects	1-19 Pollution per turn
Low Pollution	-5 Stability per District -50% on Districts that produce Food, Faith, Influence, Science, Money.	20-49 Pollution per turn
High Pollution	-10 Stability per District -100% on Districts that produce Food, Faith, Influence, Science, Money.	50+ Pollution per turn

Mitigating Pollution

Currently the only ways of reducing Global Pollution are:

Building Nature Reserves -3 Pollution

Planting Forest which will provide a -10 Pollution effect on the current per turn Pollution value for 2 turn. After 2 turn, the per turn Pollution increase will rise back to the pre-Forest level.

It's also possible to decrease amount of Pollution produced by a city. Fusion Reactor technology provides -50% Pollution, meaning more Pollution must be produced by territory to reach dangerous Pollution levels. Certain Infrastructures decrease amount of Pollution produced, summing additively to -90% Pollution produced on Makers Quarters.

Pollution produced on Farmers Quarters is reduced -20% by the Sewage Treatment Plant. (Social Housing Technology)

Pollution On Makers Quarter	Pollution On Train Station	Pollution On Airport	Infrastructure	Technology
-10%	-1 Pollution	-2 Pollution	Hydroelectric Dam	Power Lines
-20%	-1 Pollution	-2 Pollution	Solar Farm	Renewable Energy
-30%	-1 Pollution	-2 Pollution	Wind Farm	Renewable Energy
-30%	-1 Pollution	-2 Pollution	Nuclear Plant	Nuclear Fission