The Sustainable Development Index (SDI), designed by anthropologist and author Dr Jason Hickel, calculates its results by dividing a nation’s “human development” score, obtained by looking at statistics on life expectancy, health and education, by its “ecological overshoot,” the extent to which the per capita carbon footprint exceeds Earth’s natural limits. Countries with strong human development and a lower environmental impact score highly, but countries with poorer life expectancies and...
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