Due to a smaller population, Iceland is one of the least polluted countries in the world. But clean air isn't the only reason why Icelanders are so healthy; they also like to hit the gym. Due to chilly weather much of the year, Icelanders workout in order to beat the winter blues. The country enjoys one of the highest life expectancies (72 for men and 74 for women). It also has one of the lowest infant mortality rates at 2 deaths per 1,000 babies. Forbes Magazine ranked it the healthiest country in the world.