Ice cores reveal climate secrets

The amount of greenhouse gas in the atmosphere is higher than an any other point in the past 800,000 years.

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Lüthi, D. et al. Nature 453, 379-382 (2008).
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Loulergue, L. et al. Nature 453, 383-386 (2008).
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Authors

Geoff Brumfiel
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Brumfiel, G. Ice cores reveal climate secrets. Nature (2008). https://doi.org/10.1038/news.2008.825