Trends in urbanization. Myths of the city / Lost garden cities: pre-Columbian life in the Amazon / Gigalopolises: urban land area may triple by 2030 / Decoding Mexico's city of Gods / A tale of two city-states / The rise of homo verticalis / Cities are surprisingly fragile / The science of cities. Bigger cities do more with less / Grid unlocked: how street networks evolve as cities grow / How traffic jams decentralize cities / Simple mathematical law predicts movement in cities around the world / Urban inequality. Why building green can keep people out of jail / Share the wealth: new urban poverty atlases now provide data to slum dwellers / Street markets and shantytowns forge the world's urban future / Race colors new residents' views of local businesses / Photos tagged as art linked to rising property prices / Who benefits from public green space? / Imagining the future city . Revolutionary rail: high-speed rail plan will bring fast trains to the U.S. / Auto Immune: cities convert streets into pedestrian, cyclist and mass transit thoroughfares / Can suburbs be designed to do away with the car? / Can a sustainable city rise in the middle eastern desert? / The inconvenient truth about smart cities / What's holding smart cities back? / Designing the green city. The fishy business of waste / How green is my city / How businesses use data to outsmart nature's wrath / "Positive cities" can improve earth as well as people's life / Sustainable cities put waste to work / U.S. cities lose tree cover just when they need it most / Cities need to prepare for water day zero / Sustainability solutions for megacities / What is a smart grid, and how might one protect our energy future