The IPCC's Sixth Assessment Report (2021) reports that carbon dioxide concentrations have reached levels not seen in at least 2 million years, with current levels exceeding 400 ppm.

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  ESS Subtopic 6.2: Climate change – Causes and Impacts

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• ESS Subtopic 6.2: Climate change – Causes and Impacts www.mrgscience.com mrgscience.com via serper

Referenced by nodes (2)

• Intergovernmental Panel on Climate Change entity
• carbon dioxide concentration concept