Historical ice core graphs: https://cdiac.ess-dive.lbl.gov/images/air_bubbles_historical.jpg https://cdiac.ess-dive.lbl.gov/images/air_bubbles_historical... M

Historical ice core graphs: https://cdiac.ess-dive.lbl.gov/images/air_bubbles_historical.jpg https://cdiac.ess-dive.lbl.gov/images/air_bubbles_historical... More ice core data: https://cdiac.ess-dive.lbl.gov/trends/co2/ice_core_co2.html https://cdiac.ess-dive.lbl.gov/trends/co2/ice_core_co2.html