Is it normal to talk to your husband about pollution?

This is normal. Couples can swear, not to mention that he is already your husband. It's normal to chat like this, just to see if you want to chat like this. If you are willing to chat like this, it is really normal, but if you don't like this kind of chat, you can communicate with her and negotiate with him that you don't like this kind of chat. I believe he will love you as much as your husband and will change for you.