Do you think it's actually something to be concerned about or just a another doomsday myth like the year 2000 computer break down?

Here's a little more clarification...you do realize that the world has been around for millions of years, right? Therefore, we have obviously undergone much change and probably on a couple of occasions been wiped out as a civilization. Do you think with everything that is currently happening both socially and environmentally, there isn't a possibility that this could happen?