He āhuatanga ka hua ake i te noho mai o ētahi haurehu ki te kōhauhau, pērā i te hauhā (CO2), te mewaro (CH4), me te mākōwaro (CFC). Ko te mahi a ngā haurehu nei he miti i te pōkākā o te Rā e whakaatangia ana e te mata o Papatūānuku, ā, mā konei e mahana haere ai te kōhauhau.
A phenomenon which arises from the presence of certain gases in the atmosphere, such as carbon dioxide (CO2), methane (CH4) and chlorofluorocarbons (CFC). These gases absorb the Sun’s radiation reflected from the Earth, thereby increasing the temperature of the atmosphere.