I think if you have mandatory carbon caps combined with a trading system, much like we did with sulfur, and if you have a tax-incentive program for investing in the solutions, that there’s a package there that’s very, very good. And frankly, it’s something I would strongly support.

[…] 

What we ought to be doing is inventing a whole series of breakthrough mechanisms that create incentives for people to have a better environmental outcome in an economically positive way, to accelerate the transition to better and cleaner technologies.