 OK, so we don't know the finite amount. We don't know how much coal is in the ground. I've looked at studies that said there's at least 200 years worth of coal in the ground. If we used what we use now, there's 100 and something years worth of oil that they know of. And do you think we know where all the oil is? No. I'm just saying you can't force us to do something that's clearly not cost effective.