Izvi zvichaita kuderedza mwero kabhoni dhayokisaidhi mumhepo, sezvo izvi weathering pezvakaitwa kutendeutsa kabhoni dhayokisaidhi gasi kuti yakasimba carbonates. Mukati inotevera 600 miriyoni makore kubva ikozvino, ari wevasungwa kabhoni dhayokisaidhi achawira pazasi inokosha chikumbaridzo kunodiwa kuti varambe C3 photosynthesis: vanenge 50 zvikamu pamiriyoni. Panguva iyi, miti nemasango kwavo iyezvino siyana havazokwanisi kurarama, yokupedzisira mhenyu miti kuva nokusingaperi-green conifers. Zvisinei, C4 kabhoni kugadziriswa anogona kuramba panguva zvikuru yakaderera yevasungwa, pasi kumusoro 10 zvikamu pamiriyoni. Saka miti vachishandisa C4 photosynthesis biosphere vangakwanisa kukwira kweanenge 0.8 mabhiriyoni uye zvichida sezvo refu sezvo mabhiriyoni 1.2 kubva zvino, izvo zvichaita kuti kukwira tembiricha ose oscillation kuchinja kabhoni dhayokisaidhi gasi kuti yakasimba yakasimba carbon dioxide. Zvisinei, kana vasara mumamiriro okunze anosvika anenge 5% pasi pasi pano, asi kuramba achirarama kwenguva refu zvinokonzerwa nekukwira carbon dhayokisaidhi mw
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