By 
David MacKay
 | 
TEDx Talk

A reality check on renewables

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.

Related tags:

tedx
climate change
data
global issues
math
solar energy
sustainability
wind energy
electricity
renewable energy
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