Because so small a fraction of global emissions will be abated by the scheme, simple calculations based on the IPCCs central assumptions about how much warming will occur this century (which, for the sake of argument, I simply accepted as correct) show that as a result of the full and successful operation of the scheme global CO2 concentration will fall from 410 to er 409.93 parts per million by volume by the end of the decade.
Fallacy: impossible expectations