Reopened
Is $\mathbb{Z}[x,y,z]$ an $\mathbb{N}$-graded ring?Is $\mathbb{Z}[x,y,z]$ an $\mathbb{N}$-graded ring?
This very straightforward question was closed as lacking context. I don't really know what more context you could want from the question; I already added to the question information from the comments clarifying OP's motivation in asking the question.