www.ams.usda.gov/AMSv1.0/ams.fetchTemplateData.do

"USDA Organic" is one of the best known standards and logo for green products.  This page discusses the certifcation in depth

www.epa.gov/

The Environmental Protection Agency is a US government department dedicated to improving the helth of the land.  It might be a helpful sorce for standardization. 

www.sustainablepackaging.org/projects.asp

The Sustainable Packaging Coalition is dedicated to greating a world of less wasteful packaging.  They have lots of educational materail, but we must pay large fees for them.