Climate change is 'out of control,' says the United Nations.

The record for the highest global average air temperature was broken three times last week, making the past few days the hottest since official records began in the 1850s.

These estimates are causing great concern that the Earth may be entering a period of unprecedented heat for several years.

The record-breaking heat has even surprised climate scientists, who warn that the warming trend will only worsen in the coming years. Heatwaves are sweeping across the world.

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