Ku qor faahfaahin faahfaahsan faqradan - Sanadkii 2015, laba hay'adood oo ka tirsan khubarada sayniska ee rasmiga ah ee UNFCCC ayaa soo gabagabeeyey in, "gobollada qaarkood iyo nidaamyada deegaanka ee nugul, khataro sare ayaa la saadaalinayaa xitaa kuleylka ka sarreeya 1.5 °C". Go'aankan khabiirnimada ah, oo ay weheliso codka diblomaasiyadeed ee xoogga leh ee dalalka ugu saboolsan iyo jasiiradaha Baasifigga, ayaa horseeday go'aanka Shirka Paris ee sannadkii
2015, si loo dejiyo 1.5 °C bartilmaameedka muddada dheer ee kor ku xusan bartilmaameedka 2 °C ee hadda jira.