If left to off-gas, these bottles of polluted water freeze the environment:
Notice that the room below was full of the off gassed polluted oxygen at the beginning.
Happening on the current live branch.
Vacuum a room, divide it by half with airflow tiles, place a row of mesh tiles on top, pour some supercoolant on top of the airflow tiles. Pour some supercoolant on the room below, not exceding the 1800 g per tile (around 1300 in my case). Build liquid reservoirs on the room below and fill them with polluted water, deconstruct the reservoir once they fill, let off-gas the bottles. Filter the polluted oxygen on top with deodorizers. After some cycles the room just go cryogenic.