- GEO Year Book 2006: An Overview of Our Changing Environment
- This publication describes major global environmental issues and policy decisions during 2006. digital.library.unt.edu/ark:/67531/metadc28575/
- Global Trends in Sustainable Energy Investment 2010: Analysis of Trends and Issues in the Finacning
- This report shows that in spite of the global economic downturn, investment in sustainable energy is still strong. digital.library.unt.edu/ark:/67531/metadc28505/