The 9 worst cities to live in the world

Some of the world's major cities are becoming tougher places to live due to rising political and social unrest, as well as growing threats of terrorism.

The Economist Intelligence Unit report, which ranks the best and worst cities to live in the world, found that 10 cities in Western Europe suffered falls in liveability in the wake of attacks in Paris and Brussels.

"Factors such as social unrest in many US cities due to the deaths of black people in police custody, tensions in Eastern Europe and Asia and the ongoing civil wars in Ukraine, Syria and Libya have led to greater security concerns and compounded this decline," the report added.

The EIU's Global Liveability Ranking provides scores out of 100 for lifestyle challenges in 140 cities worldwide. It looks at which cities have the best living and worst living conditions. The ranking takes into account healthcare, education, infrastructure, safety, and the threat of terrorism. It then gives an overall mark out of 100.

The EIU said "the survey is designed to address a range of cities or business centres that people might want to live in or visit. Although few could currently argue that Damascus and Tripoli are likely to attract visitors, their inclusion in the survey reflects cities that were deemed relatively stable just a few years ago."

After looking at the nine best cities to live in the world, Business Insider decided to take a look at the worst cities to live in the world.