Funga kuti iyo marasha Isimba kubva kare. Nguva yegoridhe yesimba remafuta aya inoitika izvozvi. Sei? Pasi rose, mafuta achiri kutonga, asi munyika dze G20Zvisinei, imarasha ndiyo iri kutungamira. Izvi ndizvo zvazvinoratidza enerdata mumushumo wake wakabudiswa mukupera kwaMay.
Maererano nekuverenga, muna 2008, marasha akaita 27% uye petroleum 35% yesimba rinodyiwa munyika dze G20 Makore mashanu gare gare, hukama hwadzoreredzwa ne marasha iyo inokwira kusvika ku34% uye mafuta anodonha kusvika ku29%. Nezve iyo gasi, ichiri yakagadzikana, 20%. Mamiriro asingagadzirisike, sezvo marasha iri simba rinoburitsa huwandu hukuru hwegreenhouse gasi.
Kupfuura 60% yekuwedzera mukati chisi pasirese ye CO2 kubvira 2000 inouya kubva pakupisa kwemarasha kugadzira magetsi Uye kupisa.
Nekudaro, hadzisi nyika dzese mu G20 vanoshandisa mazimbe muzvikamu zvakafanana. Mune dzimwe nyika dze Europe (Spain, Italy, Great Britain, Romania), pane kana tsika yekudzikisa chimiro che simba dzokororo. MuUnited States, kudiwa kwemarasha kuri kuona kuwedzera nekuda kwekuwedzera kwemitengo ye gasi. Asi vatengi vakuru ndipo panowanikwa chikamu chesimbi zvakanyanya uye panodiwa magetsi inowedzera.