She is Swedish, no need to attack her on her Swedish-ness.
Thanks for posting the video of Greta speaking English. I wasn't implying that she is not Swedish. I just never came across a video where she was speaking in her native language.
I think that she is speaking that way on purpose, that is until I can find some evidence of typical Swedish people speaking with a British accent like she does. And there are plenty of examples on the internet of Swedes speaking English who don't sound anything like Greta.
Actually, I went on an autistic search for a Swede who speaks with a British accent and I did find exactly 1 (one) guy who was in Sweden speaking that way. But I want more than one because every other one that I came across sound very much like these people:
She just delibrately puts on a posh "scientific" accent when speaking in English to the UN and whatnot, because she subconsciously thinks it sounds more "urgent" and "important". I don't think it's delibrate.
I disagree and think that it is very deliberate. Maybe she just comes from an elitist family who runs in elitist circles who know their target audience - Americans. They have to present someone who speaks in a British accent because Americans subconsciously believe that someone who speaks that way is automatically credible and thus believable.