The Intergovernmental Panel on Climate Change is set to issue its strongest warning yet that climate change is caused by humans, and that the world will see more heat waves, droughts and floods unless governments take action to drastically reduce emissions of greenhouse gases. The IPCC report, released every six years, incorporates the key findings from thousands of articles published in scientific journals, concluding with at least 95 percent certainty that human activities have caused most of Earth's temperature rise since 1950, and will continue to do so in the future.

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