They are raising awareness that's for sure but there are two kinds of awareness:
Those of us who are passionate recyclers, take only one modest holiday a year, use public transport whenever possible, grow our own veg and eat less meat etc., etc., We are doing their best to make a difference in our own way and most of us have always lived like that.
Then there are those who take the day off school or work, wave their placards, disrupt the working day and shout loudly about how we are the ones who must change. They will probably then eat a takeaway pizza and when they go home and the bins are collected, any recycling will have been done by their parents.
I think it's right that the young have a voice but they are not going to change the world by protesting alone. I'd like to see some evidence that they are practicing what they preach.