They're interesting as a way of trying to understand what's happening in the economy. I mean, we want less intensity. That's a good thing. We want to accomplish more with less energy. There's no question that that's a good thing, but if we want to reduce greenhouse gases, let's be clear about it. Let's call a spade a spade. Let's have absolute levels, target them, and go for them.
On February 12th, 2007. See this statement in context.