So big cars are worse for the environment that small cars? What’s a novel conclusion. Compare the Rivian to a Nissan Armada and it looks quite green indeed.

His plan was nice enough when a few thousand people got around by horse.

Further illustrating the importance of context!

I think so because it is obviously invoking the Nazi policy concept. Absent that it sounds startlingly unnatural to me. Even in lowercase it looks odd in an English sentence. Interesting discussion. Thanks for it!

Lebensraum absolutely was a Nazi-adopted ideology that arose in the late 1800s and was the rational for German territorial expansion and colonization. Generalplan Ost was devised to implement the Lebensraum policy.

I think in that sentence it sounds extremely odd, and by divorcing “lebensraum” from its sinister context, makes it sound like you’re endorsing the concept. “In expelling Kosovar Albanians, ethnic Serbs executed their Lebensraum policy in Kosovo” might work.

You could, but if you were doing so other than discussing WWII, it would solely be to communicate that you are a neo-nazi. Outside of the historical context, it absolutely wouldn’t be used in a normal sentence by any native speaker.

What two words?

I wouldn’t say that it has become an English word in that no English speaker would use it except when talking about the Nazi policy. It’s a German word, one meaning of which is known by most English speakers.

You probably wouldn’t use it to communicate that you need a larger property, and it certainly wouldn’t be used in the context of “Volk,” but it meant habitat long before the Nazis applied the literal meaning of the compound to a (terrible) political concept.