Teddy,
I took a look at the Greendex survey and in my opinion it is seriously flawed. For example, according to the survey if I live without heat I have a higher Greendex. If I live without refrigeration, I have a higher Greendex score. I'm not sure if a minimum standard of living was established (I did not read the 50 MB report) but intuitively I find it hard to believe that millions of people living in abject poverty makes a country more ecologically sound.
If you want to see a wealthy country that is moving rapidly moving towards green growth. Look at Norway and New Zeland. Both are making great strides in that direction.
MikeCJ
Part two: I went back and downloaded the report and read it. The report was much more comprehensive that what was displayed on the web page. However, I found this little gem in the report.
No allowances are made for consumer behavior that is determined by geography, climatic conditions where respondents live, culture, religion or the relative availability of sustainable products. All of these factors ultimately affect how sustainable one’s consumption is.
I've got to say that is a huge omission on National Geogrphic's and Globe Scan's part in my opinion.