Environmental Science 12th Edition by William Cunningham,Mary Ann Cunningham

Exercise 22

The human development index (HDI) is a measure created by the United Nations Development Programme to track social progress. HDI incorporates life expectancy, adult literacy, children s education, and standard of living indicators to measure human development. The 2006 report draws on statistics from 175 countries. While there has been encouraging progress in most world regions, the index shows that widening inequality is taking a toll on global human development.
The graph shows trends in the HDI by world region. Study this graph carefully, and answer the following questions: ( Note: you may have to search online to find some answers.)
How much lower is the HDI ranking of sub-Saharan Africa from the OECD