My manager just started allowing smoking cigarettes in the office today because he and another guy like it. I hate it and I'm having trouble breathing. I'm considering walking out this afternoon but I know I'm pretty valuable and my manager's said he'd hate to lose me. Would it be professional to just go home early and email my manager that I'm working from home until there isn't smoke in the office anymore?
I know that this is probably illegal but I don't know how to stop this.