- The colours used in the various graphs facilitate a quick assessment of the actual situation. Each colour corresponds with a score range:

8 or higher 
7 to 8 
6 to 7 
5 to 6 
4 to 5 
4 or lower - Spider webs show both the value of the score (on a scale of 0 to 10) and the distance to sustainability. The outer circle represents full sustainability, the center no sustainability at all.
- Regions: we have followed the United Nations classification of regions.
- Africa Sub Sahara includes all African countries except the six Africa North countries (Algeria, Egypt, Libya, Morocco, Sudan and Tunisia)
- Note that for the graphs showing the correlation between the score and GDP per capita either a logarithmic scale or a linear scale for GDP has been chosen, depending on which scale provides the clearest picture.
- Note that in the histogram of each indicator, the raw data have been presented. The histograms of the categories, wellbeing dimensions and SSI show the score values.
- Note that in the tables Top 10 and Bottom 10, countries with the same score are listed in alphabetical order.
- The classification of income classes, according to the thresholds as defined by the World Bank (year of data 2009) are
Income class Limits
(US$ per capita per year)Number of
countriesLow income ≤ 995 12 Lower middle income 996 to 3,945 38 Upper middle income 3,946 to 12,195 45 High income > 12,195 56 - Abbreviations:
CDIAC – Carbon Dioxide Information Analysis Center
CIA – Central Intelligence Agency
EF – Ecological Footprint
EPI – Environmental Performance Index
EU – European Union
FAO – Food and Agriculture Organisation
FiBL – Forschungsinstitut für biologischen Landbau
GDI – Gender related Development Index
GHG – Greenhouse Gases
GDP –Gross Domestic Product
Gha – global hectares
GNI – Gross National Income
HALE – Health Adjusted Life Expectancy
HDR – Human Development Report
IEA – International Energy Agency
ILO – International Labour Organisation
IMF – International Monetary Fund
ISEW – Index for Sustainable Economic Welfare
MDG – Millennium Development Goals
MRYA – Most recent year available
RCW – renewable combustibles and waste
SSF – Sustainable Society Foundation
SSI – Sustainable Society Index
TPES – Total Primary Energy Supply
UN – United Nations
UNEP – United Nations Environmental Program
Unesco – United Nations Educational, Scientific and Cultural Organisation
UNICEF – United Nations International Children’s Emergency Fund
WCMC – World Conservation Monitoring Centre
WHO – World Health Organisation
WWF – World Wildlife Fund / World Wild Fund for Nature

