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Scientists New York City is by up to four millimetres a year under the weight of all its skyscrapers. A team of geophysicists from the United States Geological Survey that there are 1,084,954 buildings in the city, around 764 billion kilograms. This weight does not fixtures and fittings in buildings, the transport infrastructure, or the weight of the city's 8.5 million inhabitants. Lead researcher Dr Tom Parsons said the gradual subsidence, with rising sea levels, could New York to natural disasters. He that "every additional high-rise building could to future flood risk," especially along coastal and riverfront areas.

The researchers what is happening to New York to the problems Venice and Jakarta are having. Venice is more floods despite the construction of a $5.3 billion system of sea walls. Indonesia is a new capital city from scratch because Jakarta is . The United Nations has that 70 per cent of the world's population will cities by 2050. Parsons said: "When you a city and it gets full of people, you up with subsidence." He warned that New York City was "emblematic of a place that people to and that obviously has a high concentration of construction." Increasing urbanisation will problems for cities.