Ngokuqhuma inani labantu nokuvela okusha ama-giant kwezomnotho, umthelela wobuntu ku- imvelo kwanda ngezinsuku. Ngezinga lokuthi ukukhathala okuthile izinsiza zemvelo, ivuseleleke futhi ingavuseleleki.
La ukubalwa kwabantu ayidikibali: lapho sikhona ngokwengeziwe, kulapho sifaka khona ingcindezi eyengeziwe izinsiza okwemvelo Esikhathini esifushane sizofinyelela kwizakhamizi eziyizigidi ezingama-7.000 ... nsuku zonke kuzalwa abantu abangama-200.000 abafakwa kwingqikithi ye- inani labantu emhlabeni jikelele (kubalwa ukuzalwa nokufa).
Kulindeleke ukuthi ngonyaka ka-2050 kube nezakhamizi eziyizigidi ezingama-9.000, kanti vele ngo-2008 kwakukhona isixwayiso umthelela imvelo yesintu emhlabeni, esesiphindaphindwe kabili kule minyaka engama-45 edlule, ngenxa yokwanda kwabantu nokwanda kwe- ukusetshenziswa ngabanye.
Uma sithatha unyaka we-1963 njengesethenjwa, i- Producción industrial umhlaba wonke ukhuphuke kakhulu, yize kukhona ukushintshashintsha ngenxa yenkinga kawoyela nezinkinga zezezimali. Izinga le- ukukhula Eminyakeni engama-25 edlule kube ngama-2,9% ngokwesilinganiso sonyaka (siye saphindeka kabili eminyakeni engama-25). Izinga lokukhula ngalinye umkhuba, nokho, yayihamba kancane ngenxa ye- ukukhula inani labantu: yi-1,3% kuphela ngonyaka (iphindwe kabili eminyakeni engama-55).
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