I'll go ahead and leap into the fray and see what happens.
The projects that I noted in here, including others we have, were done with private developers. Their concern was looking at how they could take this development over time, sell it to someone who's going to live and work and own a business there, and make it economic. These things do stack up with the cost of other energy forms. When you look at the cost of using natural gas or electricity stand-alone, and look at these integrated systems, they are economic--although not on every scale; there will be spots that make sense and some that don't in terms of pure economics.
We found that most people would like green, providing it doesn't cost more than the other options out there. There's no doubt about that. But we do see, when we look at this through the Quest initiative, that there are other spots that make sense. They don't make sense everywhere. They're not all perfect. You have to look at this not as a bright-line test of economics; there's a range of guessing on where the world will be 20 years from now in terms of the cost of energy.