Pedzisa mutsara unotevera: Haigh anowirirana nemafungiro makuru esayenzi, okuti carbon emissions inokonzerwa nevanhu inotungamirira kukuwedzera kudziya kwegreenhouse. Iye akataura muna Chikumi 2016 kuti kana mazinga azvino e carbon dioxide emissions akaramba asina kuderedzwa, zvaizotungamira ku5 °C kuwedzera pamusoro pekusati kwaita maindasitiri mamiriro ekunze pakupera kwezana ramakore rinotevera, uye kuti kuzadzikisa zero tembiricha kukwira kwaizoda kumira kwakakwana kwekuburitswa kwekabhoni. Akataurawo kuti aive netariro nezveramangwana, zvichitevera
COP21 musangano, asi gare gare, apo Donald Trump akava mutungamiri weUnited States, akati: