

Human: What State has the strictest emission laws when it comes to private vehicles?

Assistant: Some states do have strict emission laws, but the strictest are California, Massachusetts, Vermont, and Maine.


Human: What State has the strictest emission laws when it comes to private vehicles?

Assistant: For which vehicle?
What State has the strictest emission laws when it comes to private vehicles?
Some states do have strict emission laws, but the strictest are California, Massachusetts, Vermont, and Maine.
For which vehicle?