They have the olfactometers to enforce odor ordinances. Because, you need to be able to measure the odor to enforce the ordinances. The author is just "concern

They have the olfactometers to enforce odor ordinances. Because, you need to be able to measure the odor to enforce the ordinances. The author is just "concerned" that the police will abuse the new ordinances to prosecute pot smokers, even though the act of smoking is now legal.