Helmut Melzer
Emakhulwini ambalwa eminyaka edlule inani labantu emhlabeni lenyuke kakhulu laba ngaphezu kwabantu abayizigidigidi eziyisikhombisa. Phakathi kuka-1900 no-2000 ukwanda kwakuphindeke kathathu kunakuwo wonke umlando wesintu - ukwanda kusuka ku-1,5 kuye ku-6,1 billion wabantu eminyakeni eyi-100 nje. Kepha nalapha kukhona intuthuko enhle okufanele iqashelwe. Izinga lokukhula lonyaka (ishadi) selivele lehle lisuka kumaphesenti ayi-2,1 laya kuma-1,2 wamaphesenti (2015). Izibikezelo zikhuluma ngokwehla okuphawulekayo okufika emaphesentini ayi-0,1 ngonyaka wama-2100. Ngakho-ke engxenyeni edlule yekhulu leminyaka siphila ezweni lapho ukwanda kwabantu kuncipha khona. Yize kunjalo, inani lomhlaba wonke lizokhuphuka kancane kancane liye kubantu abakhulu abayizigidi eziyizinkulungwane eziyi-2100 ngonyaka ka-11,2, ngemuva kwalokho ukwehla kwabantu emhlabeni kubonakala kunokwenzeka.
