>>You've got it.
>>>Carbon trading is the best market gimmick after papal indulgences. Selling imaginary things, indeed. Racket, no less.
>
>Oh yeah!! What about the flu?

Flu is real, and they had to produce actual vaccines, have people on the spot doing something palpable. They only had to produce some hype, keep the panic warmed up and twist the arms of health ministers in various countries. Not virtual enough.