Never having lived in America I haven't seen what you mention. All I hear is "we must work together to create a sustainable future for our planet" blah de blah blah.
Maybe activists are part of it. But I've met plenty of people who just don't believe it for themselves, maybe it's a bit of dogmatism or a bit of contrariness.
I had thought that the reason we don't hear about these details is they're too complicated for the mass media to bore people with. But then you think how much we all heard about mortgage derivatives, etc. in the financial crisis, and how we know all about the links between burning oil, greenhouse gasses, global warming and rising sea levels. It wouldn't take much to also connect it with loss of arable land, loss of sea food, etc.
Unless those last two points aren't very certain. But that just means the whole global warming thing might be pretty fine even if it does happen.
