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New Study: Sea Levels 3-4 Meters Higher Than Today When CO2 Was At ‘Safe’ Levels

Both the history of the Holocene as well as trends from recent decades continue to undermine claims of unprecedented sea level or coastal changes operating in tandem with rising CO2 concentrations. Per a new published study (Martins et al., 2023), during the Mid-Holocene (~7000 to ~4000 years ago), when CO2 was a “safe” ~265 ppm, […]

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