AussieDave
If they do it like they are in the USA, you won't see the control.
The government sells Carbon Credits to the companies, especially power producing companies that are burning oil, natural gas or coal.
The carbon credits don't do anything but by buying them the companies can keep on burning oil, gas or coal just like they always did.
Of course, the companies aren't going to lower their profit margins so instead, they just raise the prices of the stuff they sell.
The companies are happy and can brag about how they are "Saving the Earth" at no cost to them, the government is happy because they are "Saving the Earth" and they are making money hand over fist and the people are happy because, "The Government is saving the Earth, cleaning up our air so we can all breath and punishing those nasty companies for making all of this pollution."
You will note, the people (being gullible but not to bright) don't notice they are paying for this big scam.