The IPCC report from 1990 showed that ice extent was low in the early 1970s.
www.ipcc.ch/ipccreports/far/wg_I/ipcc_far_wg_I_full_report.pdf
NCAR also noted that prior to 1972, ice extent was low.
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The IPCC report from 1990 showed that ice extent was low in the early 1970s.
www.ipcc.ch/ipccreports/far/wg_I/ipcc_far_wg_I_full_report.pdf
NCAR also noted that prior to 1972, ice extent was low.
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