Those of you in the UK on 19 July can take a "smell walk of Sheffield’s University Quarter followed by a presentation on the role of smell in urban design." You'll learn about "the unique qualities offered by smell to placemaking; contemporary experiences of odors in town and cities; [and] design issues and tools relating to smell." Read more at Urban Design Group. Meanwhile, for some background on comparative urban odorology, check out the work of Sissel Tolaas.