The GreenBuild International Conference is the world's largest expo dedicated to green building and this year it is being held at the Philadelphia Convention Center on Nov. 20-22, 2013. Thirty thousand (30,000) people are expected to attend this event. The theme for the 2013 conference is "Greenbuild Nation," drawing on Philadelphia's roots as the birthplace…

The GreenBuild International Conference is the world's largest expo dedicated to green building and this year it is being held at the Philadelphia Convention Center on Nov. 20-22, 2013. Thirty thousand (30,000) people are expected to attend this event. The theme for the 2013 conference is "Greenbuild Nation," drawing on Philadelphia's roots as the birthplace…