David MacKay: A reality check on renewables

This quick TED talk entry is courtesy of TED.com. How much land mass would renewables need to power a nation like the UK? An entire country’s worth. In this pragmatic talk, David MacKay tours the basic mathematics that show worrying limitations on our sustainable energy options and explains why we should pursue them anyway. (Filmed at TEDxWarwick.)

Click Here to see the talk on TED.com