One of the critical barriers

One of the critical barriers to building ever higher skyscrapers is elevator construction: Elevator passengers traveling hundreds of floors would experience inner-ear problems, from severe pain to broken ear drums.
You can browse the FEED City Issue on the Web, explore it with Flash, or just read it in rich text format; no matter how you approach it, it's a treat, featuring annotated Quicktime panoramas of six street scenes from around the globe, five examinations of ambitious projects that never were (such as Frank Lloyd Wright's mile-high skyscraper), five profiles of ambitious projects that are underway, and four essays on the theme.
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