This week on the show we're tackling climate change on two fronts. 

First we'll speak with architect Gordon Gill.  Gordon is responsible for the greening of Chicago's Willis Tower among other projects and he'll tell us how architects are designing mixed use buildings that are better for the environment and better fits for city living.

And we'll talk to Julia Parzen of the firm JP Consulting.  She's brought 65 international cities together to coordinate climate action planning as the director of the New Urban Sustainability Director's Network. She'll tell us about the low hanging fruit for cities that want to make a big dent in their carbon footprint.