To meet the twin challenges of climate change and growing energy demand, major reductions in emissions from the use of existing energy sources are necessary.

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?