Can users turn off e-mails for new Answers and Comments?

So I’m wondering if there’s a way for individual users to turn of e-mail updates whenever there is a new Answer on a question they’ve asked, or new comments. I’ve been hunting through the options, and I can’t seem to find anything that does this. I think users would prefer to have the choice to get e-mails or not. Is there a way for them to define that?

Thanks!