More U.S. companies realize that climate change is an enormous business issue that they need to manage immediately.

You couldn't necessarily say, 'That hurricane, that storm, that flood only happened because of climate change,' (but) you're starting to see a pattern of extreme weather events.

Bush agreed in Gleneagles that climate change was urgent.

Climate change is, in my view, long term, the single biggest issue that we face,

That's a serious wedge, and shows a political climate change,

The big question is, what role does climate change have in all of this?