There is no need to discuss this, really.   Greta says that action is what matters.  

 This is when people usually start talking about hope-solar panels, wind power, circular economy and so on.  But I’m not going to do that. We’ve had 30 years of pep-talking and selling positive ideas. And I’m sorry, but it doesn’t work.  Because if it would have, the emissions would have gone down by now. They haven’t. And yes, we do need hope. Of course we do. But the one thing we need more than hope is action.  Once we start to act, hope is everywhere. So instead of looking for hope, look for action. Then, and only then, hope will come.