Greenroofs.com  
   Information about green roof architecture including history, advantages and issues, plant lists, markets in North America and Europe, case studies, events, and links.
   http://www.greenroofs.com/

Seattle Daily Journal of Commerce : Green Building Starts at the Top  
   Article by Elizabeth Daniel about the architecture and its application in Seattle.
   http://www.djc.com/news/enviro/11113857.html/

Northwest EcoBuilding Guild: Green Roof Project  
   Developing the technology for wide-scale residential application in the Pacific Northwest. Includes photo gallery, plant list, soils, monitoring options, and links.
   http://www.hadj.net/index1.html

City of Portland Environmental Services: Ecoroof Program  
   Includes FAQ and contact list [PDF].
   http://www.cleanrivers-pdx.org/clean_rivers/ecoroof.htm

Center for Green Roof Research at Penn State University  
   To demonstrate and promote green roof research, education, and technology in the Northeastern United States. Includes news, research, faculty profiles, and links.
   http://hortweb.cas.psu.edu/research/greenroofcenter/

Green Roofs Cool City Rooftop Gardens in Chicago to Fight Smog, Heat  
   Why city officials are encouraging green roofs.
   http://www.cityfarmer.org/greenroofs.html

CMHC: Greenbacks from Green Roofs: Forging a New Industry in Canada  
   Report on the feasibility of green roofs in Canada. Includes a chart comparing intensive and extensive systems.
   http://www.cmhc-schl.gc.ca/en/imquaf/himu/wacon/wacon_088.cfm

National Geographic News: Plant-Covered Roofs Ease Urban Heat  
   The promotion of green roofs by city governments in Canada, Japan, and the United States.
   http://news.nationalgeographic.com/news/2002/11/1115_021115_GreenRoofs.html

Earth Pledge Green Roofs Initiative  
   Supporting the creation of green roofs upon New York City's flat rooftops. Includes rationale, research, projects, workshops, and resources.
   http://www.earthpledge.org/GreenRoof.html

LIDC: Green Roofs  
   Includes design plans, specifications, costs, and maintenance.
   http://www.lid-stormwater.net/greenroofs/greenroofs_home.htm

Applying Green Roofs to Schools  
   Article by Katrin Scholz-Barth from HOK on the benefits of green roofs on schools.
   http://www.ulm.edu/lsfma/greenroof.html

EDC Magazine: Green Roofs: Stormwater Management From the Top Down  
   Article by Katrin Scholz-Barth of HOK discussing green roofs in an urban setting.
   http://www.edcmag.com/CDA/ArticleInformation/features/BNP__Features__Item/0,4120,18769,00.html

City of Chicago: City Hall Rooftop Garden  
   Includes design considerations, construction timeline, plants and landscaping [PDF], and monitoring methods and results.
   http://egov.cityofchicago.org/city/webportal/portalDeptCategoryAction.do?BV_SessionID=@@@@0288890837.1092179048@@@@&BV_EngineID=ccccadcmejimhmdcefecelldffhdffn.0&deptCategoryOID=-536889314&contentType=COC_EDITORIAL&topChannelName=Dept&

D.C. Greenworks  
   Nonprofit organization in Washington, D.C. providing job training and design, consulting, and installation services relating to rainwater management.
   http://www.dcgreenworks.org/LID/greenroofs.html

Green Roofs for Healthy Cities  
   Dedicated to creating a green roof marketplace in North America. Includes news, upcoming events, FAQ, projects, public policies, and research.
   http://www.greenroofs.org/

Livingroofs.org  
   Non-profit UK organization promoting green roofs. Includes roof types, benefits, issues, research, list of applications in the UK, case studies, and suppliers.
   http://www.livingroofs.org