So, I'm hoping you've learned something about Acid Rain on this trip. Whether it's why it happens, what it does, or how it's being solved, as long as you've learned something, then that means I did my job right. But now, you have to tell me something. There's one answer I don't have that really, only you can tell me. As we know, because of all these problems, the world is in danger. And so I ask you, are we too late?