 Nyora kuenderera mberi kweiyi ndima - Chirevo ichi chaivewo nechinangwa chekushanda sebhuku rezvemazuva ano zvesainzi izvo zvinowedzera IPCC AR4 munguva ye2009 United Nations Climate Change Conferenceyakaitwa muna Zvita 2009, uye nokuda kwehurongwa hwenyika kana hwenyika dzakawanda hwekugadzirisa mamiriro ekunze hwakatevera. 