[aerohead]

I watched all of the David MacKay video today.
Not much to comment on.
Everything he says has merit only in the context/conditions of the 'current' situation.
If you can allow that some of the represented power load is 'negotiable',then there's room to explore other realities,and 'totals' might take on a different look.
If global climate change is important,people will pay attention,and be aware.