"Only"...?
2 degrees already make monumental differences for the spreading of zoological and botanic species, measured in hundreds of thousand of kilometres, and changes in the oxygene production of maritime botanic species, algas, and krill - go figure. Deseases and epidemics, extreme weather phenomenons also intensifies, and move further noth and south of the equator, as well as growing desertification (all global deserts currently increase at speeds unknown in earth's history of the last 20000 years at least. Figure aboiut sweet water, willows and farmlands - and the interhuman conflicts that will be casued by these addtionally to the war for prosperity, ressources, energy and ideological dominance). "Only"?
