Ko ngā momo haurehu o te kōhauhau e aukati ana i te pōkākā ka whakaatangia e Papatūānuku, e hua ake ai te kati mahana e whakamahana nei i tō tātou ao. Nā te mahi a te tangata i te rautau kua hori ake, kua nui haere ngā haurehu kati mahana ki te kōhauhau, ā, nā tēnei kei te mahana haere te ao. Ko te wairehu (H2O), te hauhā (CO2), te mewaro (CH4), te hauota-rua ōkai (N2O), me te mākōwaro (CFC) ngā haurehu kati mahana matua.
The gases in the atmosphere that block the infrared radiation from the Earth, giving rise to the greenhouse effect which warms the Earth’s surface. The action of people in the last 100 years or so has resulted in an increase of greenhouse gases in the atmosphere, giving rise to global warming. Water vapour (H2O), carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and chlorofluorocarbons (CFCs) are the main greenhouse gases.