This is the 2789th most frequent Swedish word.
värna
To protect or safeguard.
Here, 'värna om' means to protect or take care of something, in a context of environmental conservation.
Vi måste värna om miljön för framtida generationer.
We must protect the environment for future generations.
In this sentence, 'värna' is used to mean safeguarding or promoting the security of a cause.
Hon jobbar för att värna mänskliga rättigheter.
She works to safeguard human rights.
The word 'värna' here is applied to the preservation and regard for cultural continuity or heritage.