With this mod player no longer can live if high-poluted zones, if player enter high-poluted zone without special armor he will take increasing damage until die. Also this mod add some kinds of armor that protect player from pollution:
Respirator
Gas mask
Light hazard suit
Heavy hazard suit
Modular hazard suit
Players in power armor also protected from pollution
This mod need air filtering mod in order to work - https://mods.factorio.com/mods/Schorty/air-filtering

Changelog:
0.2.0 - added configs, as requested by Yucie

0.1.2 - fixed crash in multiplayer when someone disconnects

0.1.1 - mod created