Denver, Colorado—one of the cities in the country to legalize marijuana use—has passed a new “odor ordinance” with a potential $2,000 fine for anyone found guilty of polluting the atmosphere with high concentrations of cannabis.
And the police department's plan for enforcement is a strange-looking device called an olfactometer, or more colloquially, the "nose telescope."
The so-called environmental ordinance is a result of confusion over the legality of somebody smoking in their own house should the smell seep out into the street. According to the odor ordinance, the smell is viewed as problematic if it is detectable once the smoke is mixed with seven times the volume of clean air. Denver police plan to use the "nose telescope" to enforce the ordinance. (Story here)