The global warming conversation sometimes pursues chimeras (illusions, or mental fabrications). I came across one today on an email list I subscribe to (which actually has nothing directly to do with global warming). At any rate, one of the contributors was mentioning hailstones in Armidale, Australia as a sign of global warming. Turns out they are arther common, and seem to have a long history.

Noise in the conversation.

There is a lot more signal than noise, more real information than false, by far. At least as far as I can tell. But fear and fascination are likely to make more chimeras in the conversation.