Happy Planet Index of unhappiest, least sustainable countries 2021

In the Happy Planet Index's ranking of the unhappiest and least environmentally sustainable countries in the world from 2021, Qatar ranked highest with a score of only 24.3. Even though Qatar is a rich country with high scores of well-being and life expectancy, its ecological footprint is extremely poor, pulling down its index score. The Happy Planet Index measures life expectancy, experienced well-being, inequality of outcomes, and ecological footprint in order to determine the countries that are able to deliver the longest and happiest, but also most sustainable lives to their residents. The Index works to measure efficiency by ranking countries relative to how they offer their people long and happy lives, for each unit of environmental output.