Pafupifupi 10% ya anthu padziko lonse lapansi, mwachitsanzo, pafupifupi anthu 650 miliyoni, ali ndi olumala.Kafukufuku akuwonetsa kuti, mwa awa, ena 10% amafuna njinga ya olumala.Malinga ndi World Population Prospects 2019 (United Nations, 2019), pofika chaka cha 2050, munthu m'modzi mwa anthu 6 padziko lonse lapansi, adzakhala atakwanitsa zaka 65, kuchokera pa 1 mu ...
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