Mezue ahịrịokwu na-esonụ: Haigh kwekọrọ n'echiche sayensị a ma ama, na ikuku carbon nke mmadụ na-emepụta na-eme ka okpomọkụ nke ụlọ okpomọkụ dịkwuo elu. Ọ kwupụtara na June 2016 na ọ bụrụ na ọkwa nke carbon dioxide na-aga n'ihu na-aga n'ihu, ha ga-ebute mmụba 5 °C karịa ihu igwe tupu ụlọ ọrụ mmepụta ihe site na njedebe nke narị afọ na-abịanụ, na iji nweta mmụba okpomọkụ efu ga-achọ nkwụsị zuru ezu nke carbon emissions. O kwukwara na ya nwere nchekwube maka ọdịnihu, na-esote
ma mgbe e mesịrị, mgbe Donald Trump ghọrọ onye isi ala nke United States, o kwuru, sị: