William McDonough - architect and developer of Cradle to Cradle philosophy and practice

Rocky Mountain Institute - a think tank managed by eco-genius Amory Lovins

PRB - the Population Reference Bureau: resources and information on the human population

PAI - Population Action International: action and education on overpopulation

World Changing - connects those with the tools, models and ideas for building a better future

Envirolink - a very well-organized links page

Ecoseeker - the green Google

St Olaf: Black & Gold & Green - St. Olaf College's website

Long Branch Environmental Education Center - home of the Environmental Resource Assessment Service