The falling price of ornobles is one really important factor in making a somewhat cooler planet plausible than seemed likely five or ten years ago. But we also have had a real rise in political activism around climae change, which has changed the calculus of our political leaders. And there are good reasons that it will continue to fall. So i think that we are approaching a point globally where almost everyone would choose to pour whatever money they're pouring into energy extraction into noble resources rather than developing new intera structure.