You're right. There's tremendous opportunity for wind, and we're going to have a lot of wind. The opportunity on tidal is more long term.
As Mr. Campbell said, you look at prices of $400 a megawatt hour, similar to solar, in order to get some of these tidal demonstration projects up. It's not going to compete. Today, you can get wind projects at $80 or $90 a megawatt hour. So essentially tidal demonstration projects are five times the cost of what wind is.
We're a ways away from getting tidal developed on a commercial scale. That doesn't mean we shouldn't be pursing it; I definitely think we should be pursuing it.
Operationally, there are issues with tidal, just as there are issues with wind. It's very predictable, and as Mr. Campbell said, it's predictable 20 years into the future, but the fact of the matter is that it comes and goes four times a day. So you have it and then you don't. You have to have other resources behind it in order to integrate it into the power system.
That's the same issue with wind, because of the intermittent nature of wind. If the wind is blowing, you've got energy; if the wind's not blowing, you don't have it. If the wind's blowing too much or there's a storm, the turbines have to shut down or they're going to blow apart, so you don't have it.
It's the integration of that. You have to have resources behind for both of those technologies.