No coastal city is immune to rising sea levels - and one expert has warned New Zealand could be at risk of sinking shorelines.

A new study from a group of New Zealand researchers shows human activity is exacerbating the risks of oceans rising and impacting land. 

Physicist and science writer Laurie Winkless says oceans are getting warmer and glaciers are melting - and it's something that should be considered for future urban planning.

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