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El Niño is here but what does it mean?

A natural weather event known as El Niño has begun in the Pacific Ocean, likely adding heat to a planet already warming under climate change. So what does this mean? Newshour's Owen Bennett-Jones spoke to Richard Allan, Professor of Climate Science at the University of Reading.

(Picture: El Niño planet-warming weather phase has begun. Credit: GETTY IMAGES)

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3 minutes