With regard to coal, the variable cost—at this point in time, that's the more reasonable measure—to produce a megawatt of coal power generation is in the order of about $15, so it's very inexpensive.
If you move to natural gas and a fairly efficient natural gas plant, that's more in the order of $45 a megawatt.
Wind is very dependent on the jurisdiction that you're in, the wind resource. Generally speaking, in a good wind resource you can get into the mid-$40 a megawatt hour. In other jurisdictions, it's more in the $60 to $65 to $70 a megawatt hour range. There's been a tremendous improvement in the wind hardware over the last couple of years. Again, there have been tremendous advancements, not only in efficiency and cost of equipment per se—the price of steel and so on—but in the ability of the equipment to capture the wind. The science behind it has improved considerably as well.