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Greenhouse-gas levels highest for 650,000 years

Climate record highlights extent of man-made change.

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References

  1. SiegenthalerU., et al. Science, 310. 1313 - 1317 (2005).

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  2. SpahniR., et al. Science, 310. 1317 - 1321 (2005).

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Hopkin, M. Greenhouse-gas levels highest for 650,000 years. Nature (2005). https://doi.org/10.1038/news051121-14

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