Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: Saurin lalacewar ma'adanai na silicate zai ƙaru yayin da yanayin zafi ke hanzarta ayyukan sunadarai. Wannan kuma zai rage matakin carbon dioxide a cikin yanayi, yayin da waɗannan hanyoyin lalacewa ke canza iskar carbon dioxide zuwa carbonates mai ƙarfi. A cikin shekaru miliyan 600 masu zuwa daga yanzu, yawan carbon dioxide zai faɗi ƙasa da ma'aunin da ake bukata don ci gaba da photosynthesis na C3: kusan kashi 50 cikin miliyan. A wannan lokacin, bishiyoyi da gandun daji a cikin siffarsu ta yanzu ba za su iya rayuwa ba, bishiyoyi na ƙarshe da ke rayuwa sune bishiyoyi masu tsami. Duk da haka, C4 carbon fixation na iya ci gaba a ƙananan ƙananan ƙananan, ƙasa zuwa sama da 10 sassa na miliyan. Don haka tsire-tsire masu amfani da hoton C4 na iya rayuwa aƙalla shekaru biliyan 0.8 kuma wataƙila har zuwa shekaru biliyan 1.2 daga yanzu, bayan haka zafin jiki zai sa yanayin rayuwa ya zama ba zai yiwu ba. A halin yanzu, tsire-tsire na C4 suna wakiltar kusan kashi 5% na tsire-tsire masu tsire-tsire na duniya da 1% na nau'ikan tsire-tsire da aka sani. Misali, kusan kashi 50% na dukkan nau'ikan ciyawa (Poaceae) suna amfani da hanyar C4 na photosynthetic, kamar yadda yawancin nau'ikan da ke cikin dangi na Amaranthaceae suke yi.Lokacin da matakan carbon dioxide suka sauka zuwa iyakar inda photosynthesis ba zai iya dorewa ba, ana sa ran adadin carbon dioxide a cikin yanayi zai tashi sama da ƙasa. Wannan zai ba da damar tsire-tsire na ƙasa su bunƙasa duk lokacin da matakin carbon dioxide ya tashi saboda ayyukan tectonic da numfashi daga rayuwar dabbobi. Koyaya, yanayin dogon lokaci shine don rayuwar tsire-tsire a ƙasa ta mutu gaba ɗaya yayin da yawancin carbon da ya rage a cikin yanayi ya zama an tsare shi a cikin Duniya. Wasu microbes suna iya photosynthesis a taro na carbon dioxide na 'yan sassa da miliyan, don haka wadannan siffofin rayuwa zai yiwuwa bace kawai saboda tashin zafin jiki da kuma asarar da biosphere. Plants <unk> da kuma, ta hanyar tsawo, dabbobi <unk> iya tsira tsawon by tasowa wasu dabarun kamar bukata kasa carbon dioxide ga photosynthetic matakai, zama...  Tambaya: Wace iskar gas ce za ta haifar da asarar rai idan ba a mayar da ita ta hanyar tsire-tsire ba?
iskar oxygen