The smell display is what I like best. It’s part of a terrific new exhibition called “Ecological Urbanism,” now at the Harvard Graduate School of Design. An artist named Sissel Tolaas gathered air samples from 200 neighborhoods in Mexico City and bottled each of these in a tiny glass bottle. She then asked 2,000 people to sniff and record their responses. Those responses, which are carefully labeled on the bottles, are as delicately discriminatory as those of a wine connoisseur.
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