9. Sweden
Another part of Scandinavia Peninsula, Sweden is also falling in the cleanest nations on the planet and stand on 9th spot in the rankings. When it comes to the cleanest and happiest nations, no one can deny Sweden to visit Sweden. With its delightful atmosphere and the peaceful people, it is considered the best place to settle in. The average life expectancy rates in Sweden are higher than many other developed countries around the world. Also See: The top countries with the cleanest water..
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