The Guardian’s Newton Channel includes an 11 minute video about the world’s first commercial solar power plant, in Spain. Could this technology be used more widely to help the world build a sustainable, low carbon future? What are the limitations of this technology? What are the limitations of our ability to harness the sun’s energy? How much energy are we talking about? Learners in sunny places could try to recreate Sir John Herschel’s 1838 experiment or watch Brian Cox Measuring a Sunbeam.