Helmut Melzer
Kwi-1820, bekukho phantse amawaka ezigidi ze-1,1 zehlabathi, uninzi lwazo olungaphezulu kwee-1 bhiliyoni luhlala kubuhlwempu obugqithisileyo (phantsi kweedola ze-1.90 ngosuku). Ukusukela malunga ne-1970, siphila kwihlabathi apho inani labantu abangathathi ntweni lisanda, ngelixa inani labantu abahlwempuzekileyo lihle kakhulu. I-1970 2,2 yezigidigidi yabantu yayihlala kwintlupheko egqithisileyo, i-2015 yayisisigidi se-705, malunga neepesenti ezisibhozo zabemi behlabathi. Uqikelelo lwe-UN lubonisa ukuhla okungaphezulu ukuya kwiipesenti ezine kunyaka we-2030.
