Ndapota ndiudzei zvinhu zvikuru zvinogadzira simba munyika yose
Context:Kugadzirwa kwesimba kunosvika ku80% kunobva mumarasha, hafu yacho inogadzirwa neChina, United States uye nyika dzeArab dzePersian Gulf. Nyika dzeGulf neRussia dzinotengesa kunze kwenyika yakawanda yezvadzinogadzira, zvikurukuru kuEuropean Union neChina, uko simba risina kukwana rinogadzirwa kuti rigutse zvinodiwa. Kugadzirwa kwesimba kuri kuwedzera 1 kusvika 2% pagore, kunze kwesimba rezuva nemhepo iro raive neavhareji ye20% pagore muma2010.
Midzi mikuru yekugadzirwa kwesimba ndeyefossil, inomiririra inenge 80% yekugadzirwa kwesimba kwese. Inenge hafu yesimba rinogadzirwa nemanyuko emafuta anogadzirwa neChina, United States nenyika dzeArab dzePersian Gulf. Kugadzirwa kwesimba kunobva kumanyuko anovandudzwa akadai sezuva nemhepo kwakawedzera paavhareji ye20% pagore iyo yakakwirira zvikuru kupfuura kukura kwemamwe masosi paavhareji ye1% kusvika ku2% pagore.