Thr r pst nd prsnt pblc dbts vr crtn spcts f clmt chng: hw mch hs ccrrd n mdrn tms, wht css t, wht ts ffcts wll b, nd wht ctn shld b tkn t crb t nw r ltr, nd s frth. n th scntfc ltrtr, thr s vry strng cnsnss tht glbl srfc tmprtrs hv ncrsd n rcnt dcds nd tht th trnd s csd by hmn-ndcd mssns f grnhs gss.
Th cntrvrss r, by nw, mstly pltcl rthr thn scntfc: thr s scntfc cnsnss tht glbl wrmng s hppnng nd s csd by hmn ctvty. Pblc dbts tht ls rflct scntfc dbt ncld stmts f hw rspnsv th clmt systm mght b t ny gvn lvl f grnhs gss (clmt snstvty). Dspts vr th ky scntfc fcts f glbl wrmng r mr prvlnt n th md thn n th scntfc ltrtr, whr sch sss r trtd s rslvd, nd sch dspts r mr prvlnt n th ntd Stts nd strl thn glblly.