And this is probably a good place for me to end by just saying that the issue of climate change is a perfect example of why young people have to lead. Because old people, they've created a mess, and then they'll be gone. And then you -- (applause) -- you're the ones who have to deal with it. And also what happens is old people get set in their ways. So the older you get, the more likely you are to say, that's how it's always been so that's how I'm going to keep on doing it -- even if there's a better way to do things. Young people, they're asking, well, why do I have to do it that way? Let's try it this way. And that kind of willingness to accept challenges and try things in a new way, to not be stuck in the past, or to look towards the future, that's what all of you represent.