That's awesome - I had no idea you could get them on Youtube! Thank you so much - I love this video, and refer anybody interested in Solar energy to it - not just for the content (which is fantastic) - but the references in it - such as http://science.energy.gov/~/media/bes/pdf/reports/files/seu_...

Nate Lewis is also a great speaker, and he makes such a convincing argument that Solar is the only possible future source of energy. (Nuclear doesn't even come close)

He also shows that putting solar panels on roofs doesn't even come close to what we need to do.

Worth watching every 3-4 months just to get your head around the scale of the problem.