New Scientist said:
IT'S easy not to trash the planet - if you're dirt poor and die young. But is it possible for all of us to live long and satisfying lives without costing the Earth? That's the question behind a measure of national well-being called the Happy Planet Index (HPI). Its latest update, released this week ahead of the Rio+20 summit on sustainable development, names Costa Rica as the world's most "developed" nation and puts the US on the sick list.
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