tag:blogger.com,1999:blog-27305405.post6290929596596054621..comments2008-06-21T04:11:11.965-07:00Comments on Lectures, slides and videos by Patrick Dixon: Concrete = 7% global CO2 emissions - global warmin...Dr Patrick Dixonhttp://www.blogger.com/profile/09502347538023164141noreply@blogger.comBlogger0125