This stinks.

Robyn Hudson, a charismatic professor, originally from Australia who has been living in Mexico City for quite some time, and her colleague Marco, a fellow biomedical researcher, conducted a study comparing the ability of Mexico City’s residents to detect certain smells, with the ability of people living in a Tlaxcala, a neighboring town. Mexico City and Tlaxcala are similar in many respects - they share a similar culture and climate, situated high in the mountains of Mexico. But there is one crucial difference: Mexico City has much higher levels of air pollution.

When compared to their neighbors, people living in Mexico City can only identify what it is that they are smelling at much higher levels.
…..
These findings raise the pressing question, what are the human costs of air pollution? Is it worth losing one of our five senses?

No.

This has been another edition of Simple Answers to Simple Questions.