Guardian: Tony Abbott's quip that emissions trading schemes represent "a so-called market in invisible stuff" has been rightly derided as a dog-whistle to climate denialists, unsuccessful only in that it was not pitched high enough to escape detection by the rest of us. Critics have had plenty of fun pointing out the many examples of "invisible stuff" that is, like carbon dioxide, critically important despite the fact that we can't see it -- electricity, financial risk, and so forth.
A point that has attracted...