What I said was that if you're going to use carbon pricing, you should let the pricing mechanism do the work of picking the most cost-effective strategy. If you put a carbon price in place and then you also add in a lot of regulations where you then try to direct industry over and above the carbon price, you're undermining the economics of the carbon pricing system.
Evidence of meeting #35 for Natural Resources in the 43rd Parliament, 2nd session. (The original version is on Parliament’s site, as are the minutes.) The winning word was hydrogen.
A recording is available from Parliament.