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# Factorio Runtime Docs Version 2.0.77

# PollutionMapSettings - Runtime Docs

## PollutionMapSettings :: table

These values are for the time frame of one second (60 ticks).

#### Table fields

enabled | :: boolean | Whether pollution is enabled at all.
Whether pollution is enabled at all.
diffusion_ratio | :: double | The amount that is diffused to a neighboring chunk (possibly repeated for other directions as well). Defaults to `0.02`.
The amount that is diffused to a neighboring chunk (possibly repeated for other directions as well). Defaults to `0.02`.
min_to_diffuse | :: double | The amount of PUs that need to be in a chunk for it to start diffusing. Defaults to `15`.
The amount of PUs that need to be in a chunk for it to start diffusing. Defaults to `15`.
ageing | :: double | The amount of pollution eaten by a chunk's tiles as a percentage of 1. Also known as absorption modifier. Defaults to `1`.
The amount of pollution eaten by a chunk's tiles as a percentage of 1. Also known as absorption modifier. Defaults to `1`.
expected_max_per_chunk | :: double | Any amount of pollution larger than this value is visualized as this value instead. Defaults to `150`.
Any amount of pollution larger than this value is visualized as this value instead. Defaults to `150`.
min_to_show_per_chunk | :: double | Any amount of pollution smaller than this value (but bigger than zero) is visualized as this value instead. Defaults to `50`.
Any amount of pollution smaller than this value (but bigger than zero) is visualized as this value instead. Defaults to `50`.
min_pollution_to_damage_trees | :: double | Defaults to `60`.
Defaults to `60`.
pollution_with_max_forest_damage | :: double | Defaults to `150`.
Defaults to `150`.
pollution_per_tree_damage | :: double | Defaults to `50`.
Defaults to `50`.
pollution_restored_per_tree_damage | :: double | Defaults to `10`.
Defaults to `10`.
max_pollution_to_restore_trees | :: double | Defaults to `20`.
Defaults to `20`.
enemy_attack_pollution_consumption_modifier | :: double | Defaults to `1`.
Defaults to `1`.

Concept used in

- AdvancedMapGenSettings
- MapAndDifficultySettings