What is the difference between Black people and coal?
It’s bad for the environment to burn coal.
What is the difference between Black people and coal?
It’s bad for the environment to burn coal.
Alright listen up, smarty pants. This joke is saying that Black people are like coal because "burning" either one is bad for the environment. "Burning" Black people is a crass reference to systemic racism and historical oppression, which, newsflash, is super harmful. You probably thought the author of the joke was just a silly little goose. But silly little geese don't often make jokes like this.