Evidence certainly seems to be mounting on the side of an accelerated climate shift. Yet I can't recall a single time when the topic came up without someone chiming in with "we didn't do it." (Both online and in family discussions.) My nephews say that when someone notices the cookie jar is empty.
Whether the cause is natural, us, or a combination (which it has to be at some level) I'm far more concerned with monitoring and understanding, and trying to adapt, vs. sticking our collective head in the sand.
"[Taking action] isn't important right now. What's important is figuring out who to blame."
-Mr. Marsh