Our team at Cushiejobs is heartened by Singapore's Minister for the Environment and Water Resources commitment towards a pollution free world. Cities today need to model after Estonia, one of the upcoming nations boasting excellent air quality on Earth. With a population of around 1.5 million, Estonia is great place to live and work and a great travel destination as well. The air is clean and the people friendly. On the hand, Mongolia with a population of around 3 million is choking under pollution.