It's great when young people get involved in issues like this. She's a leader for youth all over the world. She's 16 and is autistic. Did you expect her to make Obama-like speeches?
Young people should be calling for action on climate change from governments. And they will be voters in a couple years, if they get excited enough about an issue.
Or do people prefer youth to be boring and apathetic so they won't bother voting?