What does it take to become the greenest city in the country? We're broadcasting this week from the Cambridge Science Festival. In this hour, Ira and guests look at Cambridge, Massachusetts' new energy initiative. The first phase of the energy initiative, announced last month, aims to cut electricity use by 10 percent and greenhouse gas emissions by 150 thousand tons, reducing the city's carbon footprint dramatically. The plan, which will target homes, businesses, and universities, will offer energy audits and cheap loans for doing things like installing low-energy lightbulbs, insulation, and more efficient heating and cooling systems.

We'll also hear about how one company built an eco-friendly office building. Call in with your questions and comments at 1-800-989-8255 (2-3 Eastern). Teachers, find more information about using Science Friday as a classroom resource in the Kids' Connection.

Video: Attack of the Ladybugs!

Guests:
Susan Hockfield
Professor of Neuroscience
President, Massachusetts Institute of Technology
Cambridge, Massachusetts

Rob Pratt
Senior Vice-President
Henry P. Kendall Foundation
Boston, Massachusetts

Susanne Rasmussen
Director, Environmental and Transportation Planning
City of Cambridge
Cambridge, Massachusetts

John Spengler
Co-Chair, Harvard Green Campus Initiative
Akira Yamaguchi Professor of Environmental Health and Human Habitation
School of Public Health
Harvard University
Boston, Massachusetts

Rick Mattila
Director, Environmental Affairs
Genzyme
Cambridge, Massachusetts

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This segment produced by Karin Vergoth