They are at it again o.

Nigeria’s commercial capital, Lagos has been ranked third worst livable city by the Economist Intelligence Unit’s Global Liveability Index.

Lagos is only ahead of war-torn Syrian city of Damascus and the Bangladeshi capital Dhaka.

Meanwhile, at the top of the table is Vienna, Austria which dislodged Melbourne in Australia as the most pleasant city to live in.

The two metropolises have been neck and neck in the annual survey of 140 urban centres for years, with Melbourne clinching the title for the past seven editions.

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This year, a downgraded threat of militant attacks in western Europe as well as the city’s low crime rate helped nudge Vienna into first place.

Vienna regularly tops a larger ranking of cities by quality of life compiled by consulting firm Mercer. It is the first time it has topped the EIU survey, which began in its current form in 2004.

“While in the past couple of years cities in Europe were affected by the spreading perceived threat of terrorism in the region, which caused heightened security measures, the past year has seen a return to normalcy,” the EIU said in a statement about the report published on Tuesday.

“A long-running contender to the title, Vienna has succeeded in displacing Melbourne from the top spot due to increases in the Austrian capital’s stability category ratings,” it said, referring to one of the index’s five headline components.

Vienna and Melbourne scored maximum points in the healthcare, education and infrastructure categories. But while Melbourne extended its lead in the culture and environment component, that was outweighed by Vienna’s improved stability ranking.

Osaka, Calgary and Sydney completed the top five in the survey, which the EIU says tends to favour medium-sized cities in wealthy countries, often with relatively low population densities. Much larger and more crowded cities tend to have higher crime rates and more strained infrastructure, it said.

London for instance ranks 48th.

Vienna, once the capital of a large empire rather than today’s small Alpine republic, has yet to match its pre-World War One population of 2.1 million. Its many green spaces include lakes with popular beaches and vineyards with sweeping views of the capital. Public transport is cheap and efficient.

In addition to the generally improved security outlook for western Europe, Vienna benefited from its low crime rate, the survey’s editor Roxana Slavcheva said.

“One of the sub-categories that Vienna does really well in is the prevalence of petty crime ... It’s proven to be one of the safest cities in Europe,” she said.

What do you think? Do you think Lagos is really a bad place to live in?

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