We've all heard of capital. It's king, right? Plus, there's venture capital: wealth that creates new businesses. Human capital? Yep, we know that by the sweat on our brow.

And then there's natural capital. Ever heard of it?  Paddy Woodworth, author of Our "Once and Future Planet," will come to Oak Park to help us understand the concept of restoring natural capital and how this idea is transforming the way the world values and uses nature.