UrbanizationUntilrelativelyrecently,thevastmajorityofhu...
问题详情：UrbanizationUntilrelativelyrecently,thevastmajorityofhumanbeingslivedanddiedwithouteverseeingacity.Thefirstcitywasprobablyfoundednomorethan5,500yearsago. 36 Infact,nearlyeveryonelive...