Redigerer IPCCs fjerde hovedrapport (avsnitt)

=== Prognoser over avlinger i Afrika ===
Arbeidsgruppe 2 rapporterte: «In some countries, yields from rain-fed agriculture could be reduced by up to 50% by 2020.»<ref name="2007_ipcc_wg2_africa"/> IPCCs forrige leder [[Robert Watson]] kritiserer AR4 for blant annet denne påstanden om at 50 % nedgang i produksjonen av mat innen 2020 i visse land i Afrika med følgende utsagn «Any such projection should be based on peer-reviewed literature from computer modelling of how agricultural yields would respond to climate change. I can see no such data supporting the IPCC report.»<ref name="Brown_2010-02-08_times"/><ref name="Solomon_2010-02-08_nationalpost"/> [[Sunday Times]]-journalisten Jonathan Leake kalte sitatet «'''Africagate'''»<ref name="Leake_2010-02-07_times" />, en betegnelse som ble gjentatt av mange andre.<ref name="Watt_2010-02-06_wuwt"/><ref name="Delingpole_2010-02-10_Telegraph"/><ref name="Meland_2010-02-03_Db"/>. Nyere forskning bekrefter prognosen om reduserte avlinger.<ref>[http://www.sciencemag.org/cgi/content/abstract/323/5911/240 David. S. Battisti og Rosamond L. Naylor: Historical Warnings of Future Food Insecurity with Unprecedented Seasonal Heat Science 9 January 2009 Vol. 323. no. 5911, side 240 - 244]</ref> Sunday Times trykket senere en unnskyldning.<ref>{{Språkikon|en}} [http://www.newsweek.com/blogs/the-gaggle/2010/06/25/newspapers-retract-climategate-claims-but-damage-still-done.html Newsweek 25. juni 2010: "Newspapers Retract 'Climategate' Claims, but Damage Still Done"]</ref>