"The risk factors include the dimensions of the structure, its location and its location relative to other buildings around it, " explains Matthew Waldrum from Omega Red Group, who assesses the risk of lightning hitting buildings.

BBC: What is the chance of lightning striking St Peter's?

In anticipation of military operations, UNESCO has already provided the topographic features relative to the location of sites to the concerned General Staffs, as well as individual brochures and information for soldiers to prevent damage to cultural heritage.

UNESCO: MEDIA SERVICES

Other aspects of climate change and land subsidence significantly exacerbate this effect though the relative importance of these factors varies from location.

UNESCO: MEDIA SERVICES

The figures are a part of Mercer's annual cost of living survey, which covers 143 cities across six continents and measures the relative cost of more than 200 items in each location, including housing, transportation, food, clothing, household goods and entertainment.

FORBES: World's Most Expensive Cups Of Coffee

One fundamental flaw, he said, is the relative anonymity provided by the Internet's system of IP addresses, which only identify a user's general location, not a specific computer.

FORBES: Made For Hacking