The average temperature of the Earth's surface has increased by about 0,8 °C over the past 100 years and is projected to increase by between 1,8 to 4 °C by the end of the 21st century (relative to the 1980-1999 average) [15].
Tháinig méadú thart ar 0.8 °C ar mheánteocht dhromchla an Domhain le 100 bliain anuas agus tá sé á thuar go dtiocfaidh méadú idir 1.8 agus 4 °C uirthi roimh dheireadh an 21ú haois (i gcoibhneas leis an meánteocht sa tréimhse ó 1980 go 1999) [15].