https://pl.m.wiktionary.org/wiki/fekalia
dopełniacz | fekaliów
https://pl.m.wiktionary.org/wiki/fekalia
dopełniacz | fekaliów
It’s an indicator light for waste heating system.
This photo was taken in a train with a vacuum toilet (https://en.wikipedia.org/w/index.php?title=Toilet&diffonly=true#Vacuum_toilet). These toilets need less water for flushing, but since the waste is stored in a low pressure environment you really don’t want it to freeze and break anything. That why it’s heated.
Also, the proper conjungation in this case is “fekaliów”, not “fekalii”.
Now do fallout tictacs
tinfoil hat wearing doomsday preppers: what if there’s a disease outbreak? we should learn how to be independent and how to take care of our health
scientists: well, there is
tinfoil hat wearing doomsday preppers: no zombies? must be fake news :(