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Concentrating Solar

 

     Archimedes is said to have used it to torch the sales of invading Roman galleons.  In the early middle ages, it was used in Italy to melt lead.  Leonardo da Vinci designed machines to "automate" the polishing of curved solar reflectors.  And kids still focus the sun's rays on un-suspecting ants. 

 

"It's only when you look closely at an ant

through a magnifying glass on a sunny day

that you realize how often

they burst into flames"

                                            Harry Hill

 

Concentrating solar technology is still very much alive & well.  Very large concentrating solar arrays of varying designs are being used in the U.S. and in other parts of the world to generate steam which in turn is used to generate electricity.  The fuel is free, and so is the pollution (pollution-free that is).

 

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