Roses are red, violets are blue, ... boogers are black?

An old joke about boogers is this:

Q: What is the difference between boogers and broccoli?
A: Kids hate broccoli

Well, I am not sure whether that will be true anymore--kids might equally hate boogers too, given how black my boogers are here in India :)

Perhaps agencies like the EPA need not waste enormous time and money to monitor PM2.5 or any other pollutant, and can instead provide daily bulletins on booger colors reported by people!