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From Amsterdam to Zanzibar, every city has a distinct personality, shaped by location, architecture, infrastructure, history and the people who live there. Cities also have distinct smells, many of which emerge from the pollutants their inhabitants produce.

And now, visitors to the Starmus Festival — an annual celebration of science, art and culture that will be held June 17 to 23 in Trondheim, Norway, this year — will be able to breathe deeply and compare city smells, thanks to the creators of a large-scale art installation.

In a network of geodesic domes dubbed Pollution Pods, curious visitors will be able to sample reproductions of the air from cities in six different countries: São Paulo, Brazil; Cairo, Egypt; Beijing, China; New Delhi, India; London, England; and Trondheim, Norway. [Gallery: 5 Times Science Inspired Art]

Each pod measures about 20 feet (6 meters) in diameter, and consists of a hemisphere framework constructed from connected triangles of short wooden sticks and covered by a transparent plastic skin, according to a description on the Norwegian University of Science and Technology's (NTNU) website. Short corridors connect the pods, which are arranged in a large circle.

The Pollution Pods emerged from a research project called Climart, which launched in 2014 at NTNU. Climart explores the effectiveness of art installations in communicating climate messages to the public. To that end, project team members have launched climate art installations and investigated the public's response to them, analyzing a total of 37 installations thus far, NTNU representatives said in a statement.

The Pollution Pods project is the result of a collaboration between Climart and artist Michael Pinsky, who uses a range of media to visualize climate change and topics of social importance, according to the statement.  

A visualization of the Pollution Pods installation shows the ring of domes, connected by tunnels.
A visualization of the Pollution Pods installation shows the ring of domes, connected by tunnels.
Credit: Michael Pinsky

 

Visitors to the domes won't be breathing actual polluted air. Rather, they will be inhaling "harmless ingredients and fragrances" that approximate the smell of pollution that is particular to a given city, Climart project leader Christian A. Klöckner, a professor in social psychology at NTNU, said in the statement.

"The Norwegian Institute for Air Research (NILU) is contributing its expertise to create the right air mixtures for each dome, so that the smell and feel of breathing in the air is realistic," Klöckner said.

And what does the air smell like, in the cities represented in the installation?

"London is primarily diesel fumes," Pinsky told Live Science in an email.

"Delhi is a cocktail of almost everything imaginable — crop burning, diesel, rubbish burning (plastic) and dust," he added. "Beijing is a combination of industrial smells (sulfur), coal and wood burning, which is used for heating. And São Paulo has a smell like vinegar, since they use ethanol for transportation," Pinsky said.

The Trondheim dome, on the other hand, is a less-polluted coastal location, represented by the refreshing aroma of sea air mixed with forest pines, Pinsky said. 

Original article on Live Science.