The United Nations Secretary-General António Guterres has said that big polluters have a clear responsibility to cut emissions – or risk a worldwide catastrophe.

“The Pacific is today the most vulnerable area of the world,” he told the BBC at the Pacific Island Forum Leaders Meeting in Tonga. “There is an enormous injustice in relation to the Pacific and it’s the reason I am here.”

The World Meteorological Organization’s State of the Climate in the South West Pacific report says this region faces a triple whammy of an accelerating rise in the sea level, a warming of the ocean and acidification – a rise in the sea’s acidity because it’s absorbing more and more carbon dioxide.

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