In short, we aren't on track to an apocalyptic extinction, and the new head is concerned that rhetoric that we are is making people apathetic and paralyzes them from making beneficial actions.
He makes it clear too that this doesn't mean things are perfectly fine. The world is becoming and will be more dangerous with respect to climate. We're going to still have serious problems to deal with. The problems just aren't insurmountable and extinction level.
I hope, greatly, for the future. But know that any real change will have to include everyone, everywhere. Even the chuds that drive jacked up pickups covered in skulls and toting firearms. And they will never change willingly. The oil industry will continue to sow doubt and enable these idiots with cheaply available petrol, so it's not likely we'll even be able to get serious mpg regulations, much less a renewable transportation network. When florida's coast is under water, maybe that'll change a few minds... but I'm sure they'll turn it into some kind of conspiracy to persecute them even then.