Dubai is still the best place to live in the Middle East and North Africa (Mena) region, if a new report by Mercer is to be believed.The company has published its 2012 Quality of Living survey, which rates different cities based on various criteria.Indeed, it takes infrastructure, electricity and water supply, public transport, telecommunications services, traffic and the number of international flights into consideration when deciding which places have the best quality of life.Dubai finished 73rd in the global rankings, ahead of Abu Dhabi in 78th.Vienna - the capital of Austria - was deemed to be the best place to live overall.When only taking infrastructure into account, Dubai finished in a very respectable 34th in the world - way ahead of Abu Dhabi, which was rated as the 72nd best appointed city on the planet.There were very few cities from the Mena region in the top 100, which is perhaps unsurprising given the political turmoil in places like Syria and Egypt. It was no shock to see Baghdad finish in 221st position."The revolutions and unrest of the Arab Spring of 2011, during which citizens took to the streets to demand regime change or major reforms, have affected North African and Middle Eastern countries in varying ways," the Mercer report stated."In 2011, both Syria and Libya deteriorated into civil war. The Syrian civil war continued throughout 2012 and the situation remains critical as the year draws to a close."With so much uncertainty throughout the Mena region, it is little wonder that investors are increasingly looking for assets in Dubai, which has a strong government.The city continues to evolve all the time and it would be no surprise to see it feature in the top ten when Mercer conducts future quality of living surveys.New buildings are springing up all the time and the authorities are always looking at ways to improve public transport links throughout the metropolis.