Since nitrous-oxide (NO) is composed of the two most common components of air nitrogen and oxygen, it would be a tad tricky for the idiot Feds to try and regulate it, but I wouldn't doubt they'll try. I'll bet they'll soon classify oxygen (O2) a gateway drug.
“I’ll bet they’ll soon classify oxygen (O2) a gateway drug.”
they certainly want to tax CO2 emissions; so, it won’t be long until they tax the air you exhale based on your BMI.