U.S. Green Building http://www.usgbc.org

LEED Certification http://www.usgbc.org/DisplayPage.aspx?CMSPageID=222

Green Seal http://www.greenseal.org/

Green Building Pages http://www.greenbuildingpages.com/main_lr.html

Independent Certification Sources http://www.greenbuildingpages.com/links/weblinks_cert.html

Professional Trade Organizations http://www.greenbuildingpages.com/links/weblinks_prof.html

The Green Guide http://www.thegreenguide.com/

Tree Hugger’s guide on how to go green http://www.treehugger.com/gogreen.php

Yahoo Green http://green.yahoo.com/

Earth Force http://www.earthforce.org/section/programs/green

EPA http://www.epa.gov/

Green Home Guide http://www.greenhomeguide.com/index.php