Metro Detroit's infrastructure is old. Many of the homes people live in, the streets they drive on, and the drainage systems they use were constructed many decades ago. And most of that infrastructure is considered grey — it's made of concrete, steel, and asphalt. The good news is that green infrastructure projects are cropping up around metro Detroit.

What do those look like? Why do they matter? Jim Nash is the Oakland County Water Resources Commissioner. He spoke with host Robyn Vincent.