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The world's largest ever report into climate change also said it was 'unequivocal that human influence has warmed the atmosphere, oceans and land'. Scientists had expected temperatures to rise by 1.5C above pre-industrial levels between 20 but now believe it will happen between this year and 2040. The Earth is likely to warm by 1.5C within the next 20 years - a decade earlier than previously expected - and heatwaves, flooding and droughts will become more frequent and intense, a bombshell United Nations report dubbed a 'code red for humanity' has warned.
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But some experts say still hope cuts in emissions of greenhouse gases could stabilise rising temperatures.They also warned the Arctic is likely to be 'practically sea ice-free' in September at least once before 2050.A rise in sea levels approaching 2 metres by the end of this century 'cannot be ruled out', the authors said.Report: 'Virtually certain' heatwaves 'have become more frequent and more intense across most land regions'.It is 'unequivocal that human influence has warmed the atmosphere, oceans and land,' the report has warned.Bombshell United Nations report comes as record heatwaves, wildfires and floods hit countries around world.It had been thought it would happen between 20 but it is now expected between now and 2040.Scientists expect temperatures to rise by 1.5C above pre-industrial levels up to decade earlier than expected.'Code Red for humanity': Doomsday UN report says global warming is ALREADY causing extreme weather and the world will heat up by 1.5C by 2040 - a decade earlier than forecast