Iyini into engcolisa kakhulu?
I-carbon dioxide (CO2) - igesi ebamba ukushisa ekhishwa ukushiswa kwamafutha emvelo, ukugawulwa kwamahlathi, neminye imisebenzi yabantu ebangela ukuguquka kwesimo sezulu.  Izinhlayiya - izinhlayiya ezincane ezingcolisayo njengothuli, intuthu, nomusi ezingahogela futhi zibangele izinkinga zokuphefumula.  I-nitrogen oxides (i-NOx) - amagesi akhishwa yizimoto kanye nezinqubo zezimboni ezinomthelela ekungcoleni komoya futhi ezingaphendula nezinye izinto ezingcolisayo ukuze zenze i-ozone.  I-sulfur dioxide (SO2) - igesi ekhishwa ukushiswa kwamafutha emvelo nezinqubo zezimboni ezingabangela izinkinga zokuphefumula nemvula ene-asidi.  I-methane (CH4) - igesi enamandla ebangela ukushisa ekhishwa ezolimo, ukuphathwa kwemfucuza, nokukhiqizwa kwegesi yemvelo.  Ama - chlorofluorocarbon (ama - CFC) - amakhemikhali asetshenziswa ezindaweni zokupholisa, ezokulungisa isimo sezulu, nasezinqubweni zezimboni, anengxenye ekunciphiseni ungqimba lwe - ozone.