NY Times: Shafts of ancient ice pulled from Antarctica’s frozen depths show that for at least 650,000 years three important heat-trapping greenhouse gases never reached recent atmospheric levels caused by human activities, scientists are reporting…
NY Times: Shafts of ancient ice pulled from Antarctica’s frozen depths show that for at least 650,000 years three important heat-trapping greenhouse gases never reached recent atmospheric levels caused by human activities, scientists are reporting…