 Okay, so one of the great forces of nature are tides, and the energy produced by tides is usually greater than the energy by humans, for example. But in terms of shifting the Earth system, we are miles greater, actually, than a lot of forces. Tides are net zero. They don't change the rate of change of the Earth system. Maybe I'm getting ahead of myself, because when I was thinking about these statements we were making, I thought, well, is there a way we could...