I'm guilty of playing the devil's advocate here, but the truth is that Greta, in her own preachy way, has been noticed in a way that no single politician has on this subject.
The post that I copied and pasted was a little smug to say the least. It was also very righteous, like "Why are you blaming our 60s generation?"
But ultimately the truth lies in the present, regardless of when you were born.