I like polar bears but I don't really care that much about their survival or extinction.  We look at ourselves and our place in the universe as being important, and as if our time defines the universe the way it's supposed to exist.  Polar bears haven't existed for like 99.9999% of the history of the universe, and now we think it's some travesty that they won't exist in the future.  This is incredibly arrogant and self-centered thinking that I think is silly.  I guess I'd rather have a world with polar bears.  But I also largely don't care.