Vanhu vari munyika yose vakasvika rini mabhiriyoni 8?
Context:UN yakafungidzira kuti chiverengero chavagari vapasi chakasvika bhirioni rimwe kwenguva yokutanga muna 1804. Kwakanga kwasara mamwe makore 123 kuti rizosvika mabhiriyoni maviri muna 1927, asi zvakatora makore 33 chete kuti risvike mabhiriyoni matatu muna 1960. Zvadaro, zvakatora makore 14 kuti nhamba yevanhu pasi rose isvike mabhiriyoni mana muna 1974, makore 13 kuti isvike mabhiriyoni mashanu muna 1987, makore 12 kuti isvike mabhiriyoni matanhatu muna 1999, uye maererano neUnited States Census Bureau, zvakatora makore 13 kuti isvike mabhiriyoni manomwe muna March 2012. Zvisinei, United Nations yakafungidzira kuti vanhu vari munyika yose vakanga vasvika mabhiriyoni manomwe muna October 2011.  Maererano neUN, nhamba yevanhu pasi rose yakasvika mabhiriyoni masere muna November 2022, asi nokuti kukura kwevanhu kuri kudzikira, zvichatora makore 15 kuti vanhu vasvike mabhiriyoni mapfumbamwe muna 2037 uye makore 20 kuti vasvike mabhiriyoni gumi muna 2057. Mamiriro ezvinhu anobvira nokuda kwa2050 anosiyana-siyana kubva pakuderera kwemabhiriyoni 7,4 kusvika pakukwirira kwemabhiriyoni anopfuura 10,6. Nhamba dzinotarisirwa dzinosiyana zvichienderana nefungidziro dzehuwandu hwehuwandu uye zvinoshandiswa zvinoshandiswa mukufungidzira kuverenga, kunyanya kubereka uye kufa kwezvinhu zvinoshandiswa. Kufanotaura kwenguva refu kusvika muna 2150 kunobva pakuderera kwenhamba yevanhu kusvika pamabhiriyoni 3,2 mu"chiitiko chakaderera", kusvika ku"chiitiko chakakwirira" chemabhiriyoni 24,8. Chimwe chiitiko chakanyanyisa chakafanotaura kuwedzera kukuru kusvika pamabhiriyoni 256 panosvika 2150, tichifungidzira kuti mwero wokubereka pasi rose wakaramba uri pamwero wawo wa1995 wevana 3,04 kumukadzi mumwe nomumwe; zvisinei, panosvika 2010 mwero wokubereka pasi rose wakanga waderera kusvika pa2,52.  Hapana fungidziro yezuva chairoiro kana kuti mwedzi apo chiverengero chavagari vapasi chakapfuura bhirioni rimwe kana kuti mabhirioni maviri. Pfundo apo rakasvika mabhiriyoni matatu namane harina kunyorwa pamutemo, asi International Database yeUnited States Census Bureau yakazviisa muna July 1959 naApril 1974 nenzira yakaterana. Sangano Romubatanidzwa Wenyika Dzapasi Pose rakaronga uye rakarangarira "Zuva reMabhiriyoni mashanu" musi wa11 July 1987, uye "Zuva reMabhiriyoni matanhatu" musi wa12 October 1999. Dhipatimendi reUnited Nations rinoona nezvevanhu rakati "Zuva Remabhiriyoni Manomwe" raiva musi wa31 October 2011. Sangano reUnited Nations rakapemberera kuzvarwa kwemunhu wemabhiriyoni masere musi wa15 Mbudzi 2022.
Maererano neUN, vagari venyika yose vakasvika mabhiriyoni masere muna November 2022