The discussion takes place at noon, Friday Sept. 4, on the 91 Ustream channel.

Prospects for passing climate legislation this fall, why the Cash for Clunkers program didn’t quite live up to its hype, and other timely and controversial environmental issues will be the focus when William L. Chameides appears on Duke’s new online “Office Hours” program at noon (EDT), Friday, Sept. 4.

Chameides, dean of Duke’s Nicholas School of the Environment, will take questions from the public on Duke’s Ustream channel, . 

Viewers can submit questions in advance or during the session by email to live@duke.edu, on the  or via .

Chameides is a member of the National Academy of Sciences and former chief scientist at Environmental Defense Fund. His blog, The Green Grok, () has been cited byThe Wall Street Journal, USA Today, Huffington Post and other media outlets, and explains today’s most pressing environmental issues in language everyone can understand.