This week on Smart City, we have two authors who are re-imagining some persistent but outdated ideas from the 20th century.

Alex Steffan is a journalist and author who runs the organization and website The site practices what he calls “Solutions based journalism” on the environment and has become the go-to source for forward thinking solutions on climate change and sustainability. Alex joins us to tell us about this new vision for journalism and how to build a brighter future. Alex is the author of “Worldchanging: A User’s Guide for the 21st Century.”

And we’ll talk with author and Harvard professor William Julius Wilson. He’s written extensively on race in America from his seminal work, “When Work Disappears : The World of the New Urban Poor” to his latest, “More than Just Race: Being Black and Poor in the Inner City (Issues of Our Time).” Professor Wilson joins us to talk about reframing the relationship between race and poverty.

Smart City is a syndicated, weekly hour-long public radio talk show that takes an in-depth look at urban life: the people, places, ideas and trends that affect us all. Host Carol Coletta, president and CEO of CEOs for Cities, talks with national and international public policy experts, economists, business leaders, artists, developers, planners and others on the pulse of city life for a penetrating discussion on urban issues.

Smart City is broadcast at 6 a.m. Saturday and Sundays on WKNO-FM, but it is also webcast and podcast so you can listen to it anytime you like. For the webcast, times for the broadcast in other cities and to sign up for the podcast, visit our website.