There are more than a million buildings in New York City that weigh 762 million tonnes (1.68 trillion pounds).

The massive cocktail of concrete, metal and glass is one of the critical factors causing the city to sink at a considerable rate of 1-2 millimetres per year, according to researchers at the United States Geological Survey and the University of Rhode Island.

But it isn’t the only cause.

In this revealing video, journalist Alexander Trowbridge asks experts to explain the unusual combination of natural events causing the Big Apple to dip, and how the city prepares to mitigate the situation.

In this revealing video, video journalist Alexander Trowbridge talks with experts who explain the unusual combination of natural events dipping down the Big Apple and how the city prepares to mitigate the anticipated situation.

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