Age: IF CARBON trading gets up, the Federal Government will “cap” or put a limit on how much greenhouse gas can be emitted in a given year. That much is reasonably widely understood. What remains less well understood is that, in doing so, that cap will also put a limit on the cuts to emissions possible that year too. Let’s take a hypothetical example to see how it is all supposed to work. Fast forward to 2011, and pretend that the Rudd Government’s Carbon Pollution Reduction …