I agree with those who pointed out that you should say which specific rumors you are talking about. In general, it's all a matter of fact-checking. If you see a piece about something and you are not sure what to think of it, you should do the following:
1. Make sure it's posted by a famous website, not a no-name.
2. Check the sources. What is the article referring to? If it's an interview, you can check it out, if it's info from an official government website, then it is to be trusted (unless it's about something that the government might not want to reveal).
3. Is it realistic? If it's too dystopian or too good to be true, it's probably fake.
Finally, make sure you can distinguish facts from opinions, emotional evaluations and other things like that.